Running alternatives to Systemd.

waydroid (if you don’t install a wayland based de)

Compared to Arch(-based): Accesing the latest packages. It’s not impossible, especially if you go for Debian testing repos, but it’s definitely extra work.

Compared to special-purpose distros (i.e. gaming, portable, high security/privacy, pen-testing): Whatever their special purpose is will usually be harder to achieve.

Compared to huge corpo distros (SUSE/Fedora and derivatives): Ease of more intricate setups and maybe some security testing.

Compared to Ubuntu: Paying a corporation to not withhold security patches from you.

Brag about being an Arch user (BTW.)

Y-you’re not supposed to ask that!

You can’t have your entire system configuration in a repository of plain text files, which has lots of advantages, but it’s not worth caring about unless you feel excited to get into it.

Nothing

If you are using Gnome distros: you can feel exactly what it feels like getting back to working in a restricted, overhyped, overbranded environment like Windows.

If you are using Ubuntu: you can get advertising during your system’s software upgrades. No, really.

If you are using Arch: you can post aroudn the internet saying you use Arch btw.

Depending on the distro, you can use some alternative software stacks, but that’s mostly the backend (eg.: systemd versus openRC, Apache vs Nginx, X vs Wayland); most “desktop app” level is mostly the same for each desktop environment, is kinda the point.

Acces to the AUR I guess? But not much really. If you like what you have just stick with it