Just tracking trended data in general would be sufficient to defeat a LARGE number of common cheats. One of the very few use cases “AI” might actually work for in a positive way. But that puts the burden on the developers and server hosters, and it’s much easier to just burden the players directly instead.
Absolutely this. Relatively quick and clean, no messing with installation or reconfiguration. That is, assuming your data isn’t completely corrupted and the old drive doesn’t just outright fail during transfer… But if that happens you were screwed to begin with.