no, they don't. just ha e to support flatpak.
yes there are, but just support flatpak.
HDMI 2.1 is a real issue.
the most common options are accessible through a GUI. The last time I had to use the terminal was months ago.
hardware support is better than windows in many ways and, yes, worse in others. Have older hardware that the OEM no longer supports? That thing will probably work better on Linux than it ever did on Windows. That's my experience, anyway