Slide out physical keyboard, notification LEDs or some form of cool lights, a dedicated camera shutter button, and a scroll wheel / touch pad like what used to be on the blackberry or like the LG KE970 I really liked that.
I really miss notification LED's though, always on display is good, but a little light is going to use far less battery and be immediately apparent from across the room by the colour what app it came from.
Agreed, Threads doesn’t even need to be federated either really, it’s just an excuse, I like that they are sticking it to Musk, that nob head needs his comeuppance.