I tried to use Zulip as _the_ interface for my personal AI assistant because its topic based memory model fits nicely for a personal assistant. But, the iOS app was barely useful to use daily. It lacked even basic features like the ability to create a topic/channel. I could not believe it would be the case and to my surprise, it was.. I have moved on to choose Rocket.chat for my needs. Choosing to implement E2E notifications over basic functions of a mobile app reinforces my decision to move away.
Sorry for the tone. It was a rant not to sound like an unthankful freeloader, but highlight the outsider perspective. The project can prioritize what they want of course.