[iLemming]

In reality this almost never happens. Besides - it is so lightweight - killing a session and starting a new one takes seconds.

[gnulinux]

Not sure what you mean? I don't use exwm but my emacs gets stuck e.g. when tramp-mode is connecting to ssh. This is not a problem for tasks I use emacs for, but if my entire OS gets stuck because I'm trying to connect a server, I'd get annoyed.

[tbe]

Maybe it's less of an issue because your window manager doesn't need to connect to ssh servers or even do any kind of heavy lifting.