It feels like there are a lot of other low sphericals now-- XDA/MDA, CSA, Akko’s ASA, XVX for backlit-- at much lower prices and shorter lead time. $115 for a 100% set stings when I’m used to sub-$40 sets from China.
I guess what GMK could bring would be brand power and standardization. Buy a few cheap sets and they’ll likely be subtly different profiles, but I’d expect MTNU sets would be interchangeable, which is a bigger deal the further you get from 104-ANSI boards