Weirdly anti-intellectual. I'm not sure what the subtle nitpick the expert brought up, but from reading the comments I gathered that they correctly pointed out that appending to a vector is merely amortized O(1), not truly worst case constant time. This is actually kind of a big deal and is an important distinction to make. As a corollary, it means you can't just use a vector as a constant time sequence data structure in a real time application unless you preallocate it.

This is from 2017 and didn't really age well. Posts like these prepared the ground for the takeover of CPython by non-experts, narcissistic bureaucrats and corporations, all of whom pretend to represent the unwashed masses. As many politicians from Pol Pot to Mussolini have done.

That is always what happens when you get rid of the experts. Ruthless mediocrity takes over!