For self-hosted https://bitmagnet.io/ is a very good and new alternative, has DHT crawler, and has an active development

It works for me, I have KDE version. I have AUR apps, SNAP (VSC works better in snap than flatpak), official repo apps. I have not had any errors in the 6 months I have been using it.

In my windows 10 server change to Ubuntu. In my personal pc continue using windows 11 or 12 when release

Manjaro, a stable descendant of Arch Linux. It has stable updates every week (more or less). You can select your favorite DE, kernel version, it is updated for optimal gaming performance, easy to install like Ubuntu. If you miss any app in the Manjaro repos you can always download it from **AUR **(Arch Community Repo), **Flatpak **or **Snap **by activating it easily from their app store.

Yes, it is similar to Endeavor OS, but I think Endeavor is more like an easier version of Arch, but just as edgy with updates and the instability that comes with it.

You can enable PWA in Firefox, try with this https://github.com/filips123/PWAsForFirefox