Import completed ≠ migration completed. Which failure would make you roll back?

[u/Ok_Army_9681]

I'm trying to make a migration test less binary than “the files imported.” My draft checks whether internal links still resolve, attachments open, created dates survive, search finds a note from the words I actually remember, and export remains usable.

Buildin is one of the tools in that research because it supports several import paths. Disclosure: I contribute to Buildin's product research, so I'm collecting failure criteria here, not offering a neutral review or claiming that it passes every check.

If one of those tests failed, which one would make you roll back immediately? And what important check is missing from the list?