Amusingly, the picture at the top of the article is not of any real PDP-11.
Yep - I smiled like you did.
It's one of the PiDP-11 simulations. I've got one just like it sitting
on my desk here (running 2.9 bsd mocked up to look like an old JHU/BRL UNIX).
I tend to leave mine running V7, but it can boot a number of systems. My PiDP-8 is running DOS-11, but admit I want to get that running TSS-8, but is has an issue I have not had the time to chance down.