Personally I haven’t. While Linux is imperfect, choosing the right distro makes the rest of the experience straightforward. And with it’s whole complexity, I find Linux more user friendly than Windows. Even driver issues, broken shadow file ownership and KDE specifics only made me more confident about my choice to use Linux after I solved everything.
Yes, but to folks accustomed to using SuperDuper to create bootable backups, it does not seem so straightforward.
That seems like a completely different issue, if you just want a clone then clonezilla, which is also easy.