Yeah I would tend to agree! I think there is freedom to do something like semver where you have breaking.nonbreaking.bugfix, which might be less “strong”... But in a world with time travel you tend to get surprised by rollbacks which is why they are always my go-to example. “I only added a field, that's non-breaking” well maybe, but the time reversed thing is deleting a field, are you going to make sure that's safe too?

And I think there's a case to be made for cleaning up handlers for old versions after a certain time in prod of course.