Calls and video chats works just fine in matrix and client like element allow you to integrate other services if you don’t like the default ones.

I’d definitely describe myself as a Discord power user

You sound a lot like someone who use windows. We are on a linux sub.

I get that there’s other things like Discord out there, but nothing works like Discord.

There’s plenty of free alternatives that works much better than discord

https://matrix.org/ecosystem/clients/