That's a nifty mechanism that also allows downgrade attacks, so it has cybersecurity implications that may or may not be acceptable. Furthermore, it might not be practical or even be possible to restore the system to factory condition due to technical reasons.

The team next door allows its systems to downgrade to a previous minor version with a mandatory factory reset. It however refuses downgrading to a previous major version because it implies the bootloader was upgraded or the storage was repartitioned and they really don't want to rollback that.