I guess it is quite expensive to implement AV1 encoder.
Edit: I meant no consumer hardware support it.
Oh I did a typo. There still is no consumer-grade product supports AV1 encode.
You're still right that there's no standard, consumer-focused card, but that's "yet" – the product is just launching later this year.
One can assume next gen nvidia gpus(rumored for the end of this year) will have it as well.
https://blog.webex.com/engineering/the-av1-video-codec-comes...
https://blog.webex.com/video-conferencing/cisco-leap-frogs-h...
https://www.youtube.com/watch?v=Op-rzboJ_1Q
H.263, H.264, VP8, HEVC, and AV1 certainly were all used by various videoconferencing apps before hardware blocks reached consumer devices.
I guess it is quite expensive to implement AV1 encoder.
Edit: I meant no consumer hardware support it.