You might be surprised to find that Windows has a similar problem to X11 - any GUI window can send messages to any other GUI window, and on consumer versions of

You might be surprised to find that Windows has a similar problem to X11 - any GUI window can send messages to any other GUI window, and on consumer versions of windows you can't use multiple simultaneous user sessions to separate different applications. https://invisiblethingslab.com/resources/2014/A%20crack%20on%20the%20glass.pdf https://invisiblethingslab.com/resources/2014/A%20crack%20on... It's true that windows has way more mitigation technologies, and X11 is more laissez-faire. But if you don't run untrusted or crappy software, linux can be pretty damn good. You just don't really know how crappy all the components of windows really are, or which mitigations are really useful or really working correctly, and in software with that much complexity there's always some stuff that isn't really working and nobody notices. In linux, if you really care, you can trim down to a very minimal curated setup, and that's really the only way to know what's really going on in your computer.