dunno why the site has a self-signed cert but it's clear that the majority of the world's production computing is done with unikernels, so the claim is false (or just opinion). Bryan's a smart guy but ... empirical observations matter.
What!?! Where are all these unikernels I am not aware of?
You can go read more: http://unikernel.org/
I think it's a fairly interesting concept but it's not like they're taking over the world or anything. FWIW, I don't DTrace was as successful as its creators might have wished either.
[0] https://en.wikipedia.org/wiki/Tanenbaum%E2%80%93Torvalds_deb...