But what's the alternative? No MAC and every app has all user privileges by default like most Linux distros? I would argue the concept has not failed, just the

But what's the alternative? No MAC and every app has all user privileges by default like most Linux distros? I would argue the concept has not failed, just the implementations have fallen short. And for good reason! It's an extremely complex confluence of cutting edge technology, UX, security, privacy, etc. It's been improving, and surely the open source community can do it even better (or at least with a greater focus on privacy).