Sure, encryption may not be important for large groups but it can happen that it may be needed. If I were to make a group with my coworkers, I’d want that to be E2EE. On top of that, even without E2EE, you need good UX to host discussion groups for various topics, and Jami is simply not there yet.

You can’t have big groups in Jami, it’s limited to a small number of participants (can’t remember how many).