SiC is used in the field for HVDC inverters, as it can be driven harder and the cooling is less critical. The difference seems to be that they got an RF mixer,

SiC is used in the field for HVDC inverters, as it can be driven harder and the cooling is less critical. The difference seems to be that they got an RF mixer, while we currently don't use lithography finer than what I can do with a ruler, masking tape and an exacto knife.