This particular accidental update has betrayed for many developers what was already a somewhat fragile trust in the auto-update system. It doesn’t shore up more confidence for selling the idea of core updates when 5.6 is released, but it doesn’t mean that auto-updates are not a good idea. WordPress.org will need to put better processes in place in order to win back users’ trust.
ClassicPress doesn’t have auto-updates, it’s great! 