I don't know what is spam for you, but when you get three message requests from three girls respectively named Tania, Clara and Ella that are contacting you about you carrier or your management skills, I call it spam.
The way that Signal integrates phone number is odd because it opens up the spam door. O understand why Signal use phone numbers this way (to make "normies" adopt Signal more easily like WhatsApp would do) but it not the best to kind of contaminate the network with the traditional cell network
You can go to Simplex (for sure a lot of people here already done it) but if only privacy nerds get to this place this is not a great solution.
We (I'm talking about us using Lemmy and chatting on SimpleX) must convince people, starting by friends and family to stop using these fucking socials then at this point SimpleX will be considered as a viable alternative
In our scenario we are thinking about someone trying to sneak on you. But a jack mic cut off is not removing the internal microphone just putting the source to a different one. So if this person has access to your PC he coule surely access other sensors than the cut off jack
Personnaly I hate all the companies that are saying they are trust worthy because they are swiss, but nevermind this is not your question.
Personnaly I wouldn't recommended you at all a "prebuilt" NAS as later you will be stuck in a proprietary env that not gonna serve you well. So buy a cheap PC out of eBay and customize it to your needs
If you want to be good in your mind, make it open source and publicly available.
The other solution is to keep it BUT think a little, if such a dev like you succeeded to make a such great working product don't you think that five eyes (and others) could do a much more advanced product within a shorter period of time?
So if you don't make it to the public someone will develop it m against your will
Waterfox try to remove some blobs of Firefox out of the box, so it's better for the normal user