KDE Plasma got a once-a-year notification that asks for donations a few months ago, which shows up in December.

I don’t see anything out of the ordinary. Pacman will warn you about those optional dependencies. But since you did not install them explicitly, there shouldn’t be any problems. Packages listed next to grub are completely optional and do not break your bootloader whatsoever.

Edit: I tried to replicate what you had and it looks like you installed qemu (qemu-base is the default provider for qemu, the first one in the list when installing) and libguestfs explicitly. You should remove them with # pacman -Rs qemu-base libguestfs.

I have tried Bazzite before and understand its appeal. I am an ex-Arch user so I prefer the system to be as minimal as possible. Fedora fits my requirements just right and Bazzite does not seem to bring anything to the table that I miss from Fedora.

Fedora Kinoite. I like KDE, atomic distros and the fact that Fedora is the only (at least that I know of) distro that has proper SELinux implementation.

I also play games on this system, so having newer kernel and Mesa versions help.

NewPipe

UFW, by default, blocks all incoming requests. This means that SSH (port 22) is blocked already. Then, if you need to, whitelist (ALLOW) ports that you want to expose to the network. For example, I have ports 1714-1764 whitelisted for KDE Connect and everything else is blocked.

I suspect you have installed either Lutris or Steam through flatpak.

Try installing both using the same method or install MangoHud both as a flatpak and a system package.

Also, I recommend enabling MangoHud with ‘MANGOHUD=1 %command%’ instead.