[hmijail]

(Author here)

"If you program it like it was C then you can get good performance" -> Note that one of the points of the post is that just using "like C" won't magically fix your performance!

If anything, you could say "If you program it like a system with limited memory then you can get good performance". That, I can imagine being a universally applicable thing.

My point is that, for example for the particular case of memory management, there is an associated cost, whatever your language is; and you need to deal with it. Ignorance of the law is no excuse, etc.