I have been converting my H265 (HVEC) collection to AV1. I am still trying to find the exact parameters for FFMPEG to produce the optimal output for the devices I use plex on. Its been a little bit of whack a mole so far, but it seems ideal for file size when I get it right.
I wonder what the video editing story is like.
It would be cool if one day (if not already today?) you could use AV1 as a drop-in replacement for h264 for recording with OBS, smoothly editing without proxy clips and rendering out highly disk size efficient videos that look good.
DaVinci Resolve's free version on Linux does not support h264 but apparently does support AV1. Kdenlive supports both. AV1 sounds like it would be a great solution for Linux if the above is possible.