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.
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.
Also unikernels appear in Brendan's predictions: https://www.brendangregg.com/blog/2023-03-01/computer-perfor...