I'm surprised AV1 usage is only at 30%. Is AV1 so demanding that Netflix clients without AV1 hardware acceleration capabilities would be overwhelmed by it?
There are a lot of 10 year old TVs/fire sticks still in use that have a CPU that maxes out running the UI and rely exclusively on hardware decoding for all codecs (e.g. they couldn't hardware decode h264 either). Image a super budget phone from ~2012 and you'll have some idea the hardware capability we're dealing with.