I can confirm it works on both RDNA2 and RDNA4, with one of the cablematters adapters. I did flash the firmware but it also worked before flashing, was just buggier. Freesync and HDR work on both GPUs, also. The only remaining issue I have (before the patchset) is the display going into standby causing issues.

Some adapters already supported Freesync before these changes but of course the TV also requires Freesync support.

It tends to be AMD GPUs that have the greatest differences in favour of Linux (except for ray tracing but that is improving in recent driver releases).

Vader 4 Pro but I can’t speak to the experience on Windows. You’ll likely need to use Steam to launch everything on both OSes to get the best experience, too.

Or wait for the Steam Controller refresh which should be launched this year.

Paperless may work for this, although it’s more focused on document scanning.

Vaultwarden is probably a better fit for password management, combined with Bitwarden app and browser extensions.