Is X11 Really That Insecure?

Honestly, I'm not excited about switching to Wayland either. It's frustrating to adapt to a new system. But keep in mind, with big DEs like Gnome moving away from X11, it's likely you'll have to make the switch eventually. Smaller environments will probably stop supporting X11 sooner than we expect.

Yeah, X11 does have some serious security flaws. Any application can potentially act as a keylogger or capture your screen without you knowing. That said, I've been using Linux since 2008 and can't recall a real-world instance of that happening, so while it's a risk on paper, it doesn't seem to cause issues in practice… for now.

X11 lacks any real security model. Even though recent updates made it so that core components don't run as root anymore, any app can still capture whatever's on your screen. The underlying codebase is quite old and unmaintainable, making it prone to vulnerabilities. Many developers have shifted their focus away from X11 because of this, which raises concerns about long-term security.