[Lazare]

If that's all he had said, there wouldn't be so much pushback. But instead, he's setting himself up as a "wise" elder dispensing advice, and (ironically) much of what he's said is wrong.

If his point two was, for example: "You should always test received wisdom. You've probably heard not to use 'with', but do you know why? Well, let's write a quick benchmark, here's some code with 'with' and here's some without. And if we benchmark it like so...hey look! The code with 'with' is a little clearer, but it's glacially slow! And now you know not just why and when to avoid 'with', but how to test other language features too!"

But instead, basically, he said "Hey, don't listen to those idiots who say not to use 'with', listen to me! And I say it's awesome!" This is unhelpful on multiple levels.