I think we read this topic in two completely different ways. I read it more as a "look at this optimisation opportunity I found" and less of a "Rabble rabble, Nim is stupid for not optimising this, rabble rabble". This is just a real-life example of someone porting code from one language to another and getting poorer performance than they expected, shouldn't that be something we take seriously if we want more people to consider Nim? And this is the very definition of a pitfall, a small change that can lead to a big performance loss. Whether a certain programmer should spot and avoid the pitfall doesn't mean that there isn't a pitfall there.
And getting people to phrase things more civilized is a two way street..
