So I forgot, does AV1 use lapped transforms? I think not..
I was a little disappointed when the Xiph & Mozilla folks’ focus shifted from Daala to AV1. There were some interesting techniques under research in Daala, and while some of it has made it into AV1, there’s other stuff that was still experimental or that would’ve been difficult to incorporate. Though so far AV1 is looking really impressive, and honestly it gets harder and harder to wait for the day when youtube & twitch stream in AV1.