I've found games running in Proton to provide better long-term compatibility than many native games. Despite Steam providing a stable runtime for native games, I have a few titles from their first major Linux push back in the '10s that are now crash-happy or exhibit substantial performance problems, but work perfectly fine when I use the Windows version with Proton.

Telling people not to even think about using their favorite piece of software is a good way to make sure they don't consider switching. A lot of popular Windows apps run perfectly fine in WINE. I've been using foobar2000 in it for a decade at this point, and have yet to find a native alternative that gives me the same feature set. So why shouldn't I keep running it?