I'm not a user of it, so It's not hurting me personally. But if I had read about how Ryzen CPUs support encrypted memory, and had chosen a Ryzen CPU for that reason, I think I'd have a pretty good reason to be upset that the feature I needed from a hardware product I bought suddenly vanished in a firmware update.

Because I think ethics goes further than "bad thing happened to me", I've formed an opinion that this is a pretty shitty move.