I see what you mean about the other CODECs like VP9 and AV1. The future looks good for them but for a Plex library not so much. I tried converting a single ~20 minute TV episode and it took about ~16mins for AOM-AV1 and VP9 was somewhat over an hour or so. But, H265 zips right along in ~5 mins or less an ep with not as much strain on the CPU. Probably be going down the H265/AAC route. Thanks for the data & information. It’s helped very much!
My Radeon 470 had Kronos Open CL but I think some of my system drivers have gone crazy because the option to use it has disappeared. I’m really considering a new build even though my system’s only 3.5 yrs old.