[bombcar]

Yeah, but even if bolt it on (which Ubuntu does for you, any other distro it's easy to do) it's still a "bolt-on" that doesn't integrate as fully as it could if it were the native filesystem, allowing full system rollback, snapshotting, boot management, etc.

It's similar to the "polish" available on macOS or Windows, Linux has all the pieces but you have to assemble them yourselves, even today.