Nope, plasma-session crash means all your windows are goooone.
If it’s only plasma-desktop or kwin crash, you can generally restart it from a terminal, and you need one terminal window open at all times to do that, since you won’t be able to launch a new window with no desktop, or you try to launch it from the text console, which works badly because it won’t see your plasma-session environment.
Hopefully when plasma crashes the clients don’t, so that’s something at least
Nope, plasma-session crash means all your windows are goooone.
If it’s only plasma-desktop or kwin crash, you can generally restart it from a terminal, and you need one terminal window open at all times to do that, since you won’t be able to launch a new window with no desktop, or you try to launch it from the text console, which works badly because it won’t see your plasma-session environment.
Kwin is now the Wayland compositor instead of just the window manager, so I’m pretty sure on Wayland if Kwin crashes, all your programs go with it