Comment by ianvorbach

Ah, thanks for elaborating! Fair and interesting point. It's true that the work these companies are doing is not pushing the cutting edge of technology readiness, but is instead exploiting the most recent advances in R&D by finding business cases that now are possible. As new materials and science advance in research institutions, startups will then step in to commercialize that tech. So I guess I'm saying we shouldn't necessarily expect YC startups to be at the frontier of R&D