So picking up an #IntelArc A380 seemed like a good idea at the time to get a reasonably cheap, low-profile GPU with AV1 support that can run off bus power alone.
Unfortunately I didn't do my own research, and the consumer #Intel discrete GPUs don't play particularly nicely with virtualisation. Intel has seemingly intentionally gimped the consumer Arc cards by removing virtualisation support, while their data centre GPU line on almost identical silicon support it.
There's ways around all of that, which I think I've just about worked out, but the #Linux Intel drivers (i915) don't play particularly well with Linux guests either, which has given me a whole new set of challenges to solve.
All in all, it's be a fun three days, with I'm sure another fun three days of trial and error ahead.