Way wider browser adoption, potential to evolve together with AV#, since it's using a container format, so it shouldn't be limited to AV1 base. I.e. sites just need to adopt AVIF, and I expect then seamless ability to start using AV2 (and on) there without sites needing another wave of adding a new mime type and etc. which seems to be a huge hurdle.
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Way wider browser adoption, potential to evolve together with AV#, since it's using a container format, so it shouldn't be limited to AV1 base. I.e. sites just need to adopt AVIF, and I expect then seamless ability to start using AV2 (and on) there without sites needing another wave of adding a new mime type and etc. which seems to be a huge hurdle.
Same as let's say Webm can contain AV1, AV2 etc.