There are a few DRMs that offer using it but none of them are in use mostly because of market share issues.

SGX isn’t available on the majority of consumer CPUs because it’s a fairly new extension and it’s Intel exclusive.

I know of a few enterprise products that use it for their “soft-dongle” licensing if you don’t want to plug in a license dongle in your server, yes it’s 2018 and we still have license dongles like it’s 1988, ESRI I’m looking at you.