I don’t mind if my server is going to have to transcode for most clients
I mean AV1 is very well supported on most clients/new devices these days. While I do not know any good groups that only encodes in AV1, I personally download high quality BD rips and re-encode them to SVT-AV1 without any visual quality loss (for my personal taste and perspective).
I’m not an audiophile or videophile and do not have the necessary devices to decode high end 1080p nor 4k video streams.
About AV1 I think only iOS devices do not have a native software/hardware AV1 decoder (I migh be wrong here).
As for your question, I wish there were more encoders that do AV1 :/