I tweeted to him to research IBM's zTPF before writing this, I guess it conflicts with the narrative he's telling though. In general, I agree with his sentimen

I tweeted to him to research IBM's zTPF before writing this, I guess it conflicts with the narrative he's telling though. In general, I agree with his sentiments, but there are no absolutes, only trade offs here. You can, for instance, hook a debugger into the kernel or through the hypervisor. And debugging hardware looks a lot like debugging a unikernel in that sense.