Today's hardware vulnerability: register file data sampling

I searched a bit, and was unable to find any. The only thing SGX on desktop would make sense for was really UHD-BR, in case you had an Atom HTPC or something (I don't think they allowed UHD-BR software players that didn't protect the keys using something similar strong?), but it doesn't seem like that was ever supported. So it was only 6th–10th generation (Skylake and up to some point).

It's hard to find information about this now, though.