Obviously, Microsoft can't give people back their deleted Onedrive files, but they can make good on a promise that it will never happen again (given that their efforts are founded in reality and not marketing speak), and hide behind a shield of 'that wasn't our intention'. Same goes with most other things you could complain about Windows.
If you have no reason to believe that Windows will screw you over, since MS has course-corrected on all major points of contention, then why not stick around? (The answer is that MS may change course again, but for those who haven't jumped ship, I'm sure this will provide good enough reason to stick around. It's not like the ship isn't providing them any utility. They've stuck around this long for a reason.)