

It’s not a matter of what people can use, but what people do use. Like it or not, Discord is the de facto standard, and it’s a lot easier to install workarounds that make Discord usable on Linux than it is to convince all your friends to switch platforms.
In my experience, very, but it’s also not magic. Being able to package an application with its environment and ship it to any machine that can run Docker is great but it doesn’t solve the fact that modern deployment architecture can become extremely complicated, and Docker adds another component that needs configuration and debugging to an already complicated stack.