> The cost of rolling your own has gotten so low that it’s almost always a better security tradeoff to reimplement the thing yourself. Is that a good thing? I’m not sure.

Why stop there? Why don’t we build our own OS before starting a project? Better yet, let's design and manufacture our own CPUs, because, well, "the cost of rolling our own has gotten so low". I’m not sure what to say; sometimes I think I live in a completely different dimension from some HN commenters.