Today I was checking out Netflix's videos to see the bitrate and codec they use and for most titles now they use av1. I checked out 15-20 movies, new and old and over 90% of those titles are using av1, bitrate was 1-2mbps but they look very good, not only good for their size but on they are on par if not better than other web-dls.
Some of them don't have proper grain and in those cases avc/hevc wins but 90%+ of NF av1 titles that I checked have perfect film grain.
Considering that HDD prices are skyrocketing, it makes sense to hoard these instead of other web-dls which are 7-11mbps bitrate (and encodes which can be 2-5mbps) assuming your device can play them which shoudnt be hard as almost all phone and PC can decode them and for TV's a $20 ONN Tv box can do the job as it has hardware decoder for av1.
Yes a bluray remux or 4k bluray would obv look better on big tvs but these NF av1 arent replacement for those, but replacement for other web-dls and encodes and its for those people who want to have like a 600 movies in high quality in only 1TB HDD.