Integrity is absolutely paramount too of course, which is why I chose Django (because of the mature DB migrations system that makes upgrades deterministic, reve

Integrity is absolutely paramount too of course, which is why I chose Django (because of the mature DB migrations system that makes upgrades deterministic, reversible, and relatively painless). Hand coding a schema migration system would be a recipe for disaster and an easy opportunity for users to lose data. Nevertheless, no system is perfect, and even with Django helping guard database integrity and multiple redundant index files, it's possible I'll make a mistake someday that leads to data loss on upgrade. I don't want that situation to be the next (mini) library of Alexandria, and saving copies to Archive.org helps serve as a last-resort backup.