I was watching today's video chat and wondered as I listened, what issues updates going forward are able to correct?

It was mentioned that there was no new event item on the calendar. Could one see that changed in an update?

Speaker and ring loudness. Is that a hardware only thing? I know on my palm
one can boost sound through software like Pocket Tunes. Is that also something that can be done via updates? I'm new to the smartphone world and am not clear on what can actually be addressed in updates.

I tried to search but did not find this so if it has been asked, I apologize and please link me to the answer.