The other thing though is that even if attachment limit were not a thing, I don’t think it’s spec compliant to send a video codec other than 3GP or whatever the format is formally called (ironically it’s a QuickTime format dating back to when 3G was an exciting up and coming standard and the iPhone didn’t exist).

If you sent an h.264 for instance, many flip phones would be unable to play it. So I think the MMS standard itself is holding us back.

I still blame Apple. If they prioritized the experience of their own customers above the value of the blue bubble in getting teens to bully Android users they could have obviously been the ones pushing a good RCS implementation with carriers by threatening credibly to drop MMS support. Instead they left it to carriers and Google who each screwed things up pretty well.