Comment by topspin

> the cost?

What cost? The lab cost today, or the cost after we figure out how to make thousands a day in a diamond wafer fab?

If this were to become practical, operating high speed circuits in space might become a great deal easier due to higher temperature differential. High frequency RF in space is valuable enough that this application is certainly a candidate for such devices, even at costs far greater than Si/SiC/GaN.