Browser adoption happens way faster than sites adoption (as current AVIF itself clearly demonstrates), so same container does matter to reduce contention on sites adoption side.
I.e. once browser adoption happens you'll be able to use AV2 for AVIF without the likes of Wikipedia taking another decade after that to add an additional mime type to their supported images.
I.e. once browser adoption happens you'll be able to use AV2 for AVIF without the likes of Wikipedia taking another decade after that to add an additional mime type to their supported images.