That's what I'm wondering.

I haven't heard any reports of or seen any abuse for emulators like Xenia, RPCS3, Dolphin, Citra, etc. I wonder if this is something unique/specific to people finding out it's Stenzek, or if it's more widespread than we realize?

Personally, I do think non-permissive licenses aren't nice, and I do think there should be criticisms, skepticism, and concerns to be voiced about that. At the same time, if it's the owners project, he is free to do with it as he wishes. Then again, if something has a large enough of a community, you could argue that it's no longer just their project. But I understand that if you want to prevent people profiting off of your work (and your contributors work), a no-commercial license does make sense. It's a complex situation.