Well, some things are improvements. But many are not, and are just changed for the sake of it. I'm a fan of SELinux (and the similar mandatory access control o

Well, some things are improvements. But many are not, and are just changed for the sake of it. I'm a fan of SELinux (and the similar mandatory access control on BSD) because it gives strong security but the user or admin keeps control. This is a much better solution than things like immutable OSes where the user can't control anything and just has to trust the developer of the OS.