Different distros build their packages with different options and have different versions of those packages so the Ubuntu and fedora php packages might have an optimization the arch one didn't
Seafile or nextcloud are my choices. I like seafile because it has an official and documented way to install it but nextcloud works well too just installing it can be tricky. One thing I like about sea file is they have a remote filesystem app that supports Linux and works better than nextcloud and webdav
Devs understand http and json way better than imap and http can support modern security protocols like oidc which standards imap doesn't support which can make using foss email in a corporate environment
Only proof of work crypto currencies require a ton of energy and the only way it's profitable is by buying energy that would otherwise be wasted like methane flaring or excess renewable generation.
Sometimes it's easier to start over than unbreak an existing project. Gnome is old and big so it's harder to change. So starting over where you don't have to keep existing features or care about existing users is way easier than fixing gnome and rewriting it in rust. Plus system 76 can. There's no single party that can stop them from making a desktop
Most operating systems mostly work find something that has a release cadence you like and is close to what you want then you will have to customize it to fit your needs
I fail to see how that differs from the current Internet