> TimeMachine is free and "good enough" for local / local network backups for most people

If you backup to an APFS-formatted network share, Time Machine is quite good and much more reliable than it was when backing up to HFS+ volumes. There was a lot of hackery going on to make HFS+ act like a modern file system emulating snapshots, which it didn't have. You could end up with millions of hard links; turns out that was kinda fragile…

APFS supports snapshots and a bunch of other features that makes Time Machine faster and more reliable.