I feel like the whole Matrix ecosystem started to stagnate.
Sadly, due to network effect, I am also present on Discord. And it seems to me that it has quite a few features that would be welcome in Matrix.
Things like multiple user tags / roles, bulk delete messages when banning a user, etc.
While I am happy that some of such missing features can be implemented with bots, doing stuff with bot commands is a workaround for what would be nice to have as part of the UI. Again, question of ecosystem. Clients would have to be very modular for implementing various random out-of-spec features.

Thank you for reading my rant.