[throwawayish]

> Think about it as an SSD manufacturer - what's the easiest way to wipe a drive?

That's not the reason why encryption is always on. Flash endurance is; encrypting the data before FEC means that it will have a random distribution, which avoids pathological worst cases with certain workloads. You could also use a different (cheaper) scrambler than AES (like CPUs do [1]), but since encryption is a marketable feature...

[1] Which are also switching to using AES and offering memory encryption in current mainstream architectures.

[problems]

Ah, interesting. That's really cool. I guess it makes things easier for them and better for their customers in several ways at once.