Storage space is one issue. Bandwidth (how many TB/mo goes out the server) is another. And for any "serious" use case transcoding would also be important (so you can keep the other two down for everyone except Apple users who are stubborn to adopt VP9/AV1, and to provide multiple quality options), which unlike the other two requires powerful hardware most instances do not have.
It uses WebTorrent for distribution between viewers watching at the same time which can temporarily help with the load on popular videos, but there still needs to be at least one source instance that's sharing the video "regularly" (for unpopular or old stuff), which ends up having the same bandwidth issues you'd get with any other video platform.
Light mode only "clicked" for me when I set my monitor's brightness all the way down. If you're getting "flashbanged" turn that brightness down. It helps (or maybe my monitor is just really fucking bright)
Except Discord which somehow manages to have the worst light theme ever created by mankind. I have no idea how anyone can use light mode without going mad. Everything else's fine.
You have to actually toggle to see it but IMO it massively improves how scrolling feels.
There are a few more scrolling-related options out there on the net if there's a particular "feel" you want to go for. https://github.com/yokoffing/Betterfox/blob/main/Smoothfox.js provides a couple you can try out, and most of these custom scrolling options use msdPhysics as a baseline.
Again - I have no idea how well it's hardware support is. I assume 3d accel and whatnot would be fine because it's widely used, but dunno if anyone tried running ROCm on it.
I wonder how well it integrates with hardware. Arch with the pacman packages has been the only distro where I could get ROCm working reliably. I'd love to make a "ROCm container" and dump all that mess into it's own sandbox.
In fact, the thing I really want is more of a "Qubes but not for security tryhards" (aka I can actually use Wayland AND game on it) where everything gets it's own container mainly for organizational purposes, but something like this sounds like a fair compromise.
Tumblr - both as the userbase and as the company - has been pretty "cool" compared to Facebook/Instagram (which isn't a high bar, really). I think most people are indifferent to favorable on letting them in here if they decide on doing that.
I think they're "getting their feet wet" with federation with an official WordPress plugin (Tumblr is now owned by the company that develops WordPress) first, before deploying it on Tumblr.
All of these are "root" mounts. I don't explicitly mount any subvolumes (they get "implicitly" mounted as folders though)