Exactly my thoughts. In addition, I doubt that the author is familiar with the principles of OTP (or immutable services in general), or he wouldn't dismiss restarting a service once it misbehaves as impractical.
I think most people are unfamiliar with Erlang/OTP. Even if I converted my entire team over, I don't know how I'd hire new people without developing strong internal training.
Perhaps that means the real argument is "Unikernels are unfit for production for people who aren't comfortable with the Erlang/OTP way of doing things." Yes, this isn't a technical argument, but—most people, most customers, don't even see SmartOS + Linux emulation as suitable for production (and I imagine the author knows that), not for any technical reason but just for unfamiliarity. And that's still a UNIX working in UNIXy ways.
