So after testing matrix and riot with friends for a couple of months, there're still a ton of work to be done. We all used the most common setup - matrix.org homeserver, riot and riotX as apps. (Also please don't point me to dev version, I am only considering what's in stable.) Random stuff not in particular order: 1a) e2e is a choice that affects experience in riot, a lot - you can't use search, you don't see recent…
3: Matrix.org homeserver performance should be absolutely fine now. Delays when doing things like joining big rooms are unrelated to the hardware, but perf optimisations we need to do to synapse in general. They're on the radar.
4: This is literally the first time i've heard an ask for 'copy entire message'. The other features exist in labs, and yes, we need to fix notifs and add custom emoji. "Many people asking" doesn't magically produce features unfortunately, especially when we are battling points 1 & 2. Contributions help though. Thanks for testing though.