It's fascinating that you see the misguided impulse being prematurely adding more servers rather than fixing the code. I would agree with that, but I would also

It's fascinating that you see the misguided impulse being prematurely adding more servers rather than fixing the code. I would agree with that, but I would also see the premise of this blog post as a similar misguided impulse -- rather than fixing the code, writing a completely new part of infrastructure from scratch in a new language because the old one wasn't good enough. Unless you've exhausted reasonable attempts to optimize existing code inside the language the original code was written in, I believe that following this impulse would be (as I alluded to in my original comment) borderline malpractice.