I think he has a major point though, he says this[0], if a desktop user or kernel dev tries RT how exactly are they going to use their system? I don't think I could even boot my system with no console output.

[0]: For all we know, there may be random users who are playing around with PREEMPT_RT. They don't have to, but they want to.

Just saying "you get no console because you wanted to try it out" is simply not acceptable.