There are several different questions here that run the gamut of security related questions, not just privacy.
If you want a lay persons answer, the gist of it is both are secure enough for the vast majority of situations. If you don't have nation states after you, use what is most convenient for your primary use case.
If you are worried about nation states... You need to do your own technical analysis, and if you are incapable of doing so... You should not be trusting random idiots on the web.
That said... The biggest difference is that signal is more secure by default, forcing end to end encryption on all communications but you have to trust a closed source private organization. Arguable the signal protocol is probably provably more secure with perfect forward secrecy (the double ratchet algorithm is legit).
Matrix has a significantly larger public surface area for non nation state level actors to observe and Messaging is arguably slower... But you have much more freedom with how much trust you give entities. Unfortunately, more of the security is up to you and your contacts which makes it less secure. (We on average are terrible at security). Matrix is probably also more resilient as a network.
Finally, Signal does not provide any anonymity whatsoever. I'm fact, it directly ties your messaging to other highly personal information. (But nobody other than you and the other participants can read any of the messages). Provide you know your contacts in real life, you can prove message authorship (you know for a fact that the message was written on their device and nobody other than the intended recipients read it).
Matrix does provide anonymous access. If this is something you need... This is the answer.
2 app servers behind a naive load balancer. Assume an actually restful service. Also assume a reasonable single app design with persistent db connections and db caching. Assume a single client. Single clients first connection comes in to app servers 1. App servers 1 makes db connection and grabs relevant data out of db. Caches information for client expecting a reconnect. Client makes second call, load balancer places it on app server 2, app servers 2 now makes a second connection and queries the data.
The db has now done twice the work for a single client. This pattern is surprisingly common and as the user count grows this duplication significantly degrades cache performance and increases load on the db. It only gets worse as the user count increases.
Load balancing applications is significantly more complex than most people anticipate. In the naive implementation it typically increases database loads and reduces site performance. Static content balancing is trivial, and cloudflare will do that by default, but implementing the hard part will require careful software development to prevent a naive implementation from bringing down the database. Sticky sessions are just the beginning.
I would put that in your original post next time. It's hard to know what kind of things to recommend if we don't know what you have already looked at. Knowing that there are standard ways of increasing drive count (such as the 4x drive pay you are using now). You can search by internal drive count and reduce your search significantly.
That said I think the fractal design 7 xl looks good.
As per my other comment you probably already are. With the exception of costal communities nearly all wastewater is recycled.
In countries with poor wastewater standards this leads to massive river pollution. You don't know about it because Sweden has strong wastewater regulations.
The vast, vast, vast majority of Americans drink recycled wastewater today. The wastewater treatment plants dump their effluent into the river upstream from where the drinking water is sourced.
By doing this, legally the drinking water source is the river and the idiots who don't understand how water treatment get to drink their own purified urine without being told they are.
The problem is that it would be significantly more efficient to skip the step of putting it into the river, since American (and most other developed nations) wastewater effluent is usually significantly cleaner than the river it is being discharged into.
It's pretty obviously cannon that any extremity put into the ring will cause thew entire person/hobbit to disappear; thus the person using it as a cock rink would disappear while the person/hobbit receiving wouldn't have any effects.
But the expectation of reciprocated loyalty shouldn't be ignored. The idea of getting rewards for loyalty are a cracked mechanism that exists because corporations can't actually create reciprocal loyalty... And instead give you partly prizes in exchange for your extended consumerism.
There are several different questions here that run the gamut of security related questions, not just privacy.
If you want a lay persons answer, the gist of it is both are secure enough for the vast majority of situations. If you don't have nation states after you, use what is most convenient for your primary use case.
If you are worried about nation states... You need to do your own technical analysis, and if you are incapable of doing so... You should not be trusting random idiots on the web.
That said... The biggest difference is that signal is more secure by default, forcing end to end encryption on all communications but you have to trust a closed source private organization. Arguable the signal protocol is probably provably more secure with perfect forward secrecy (the double ratchet algorithm is legit).
Matrix has a significantly larger public surface area for non nation state level actors to observe and Messaging is arguably slower... But you have much more freedom with how much trust you give entities. Unfortunately, more of the security is up to you and your contacts which makes it less secure. (We on average are terrible at security). Matrix is probably also more resilient as a network.
Finally, Signal does not provide any anonymity whatsoever. I'm fact, it directly ties your messaging to other highly personal information. (But nobody other than you and the other participants can read any of the messages). Provide you know your contacts in real life, you can prove message authorship (you know for a fact that the message was written on their device and nobody other than the intended recipients read it).
Matrix does provide anonymous access. If this is something you need... This is the answer.