What Casey doesn't get is that for the vast, vast majority of code out there, reliability, maintainability, scalability (to hundreds of servers, or hundreds of

What Casey doesn't get is that for the vast, vast majority of code out there, reliability, maintainability, scalability (to hundreds of servers, or hundreds of software engineers working on the code base), testability, and observability trump raw performance. CPU and RAM are cheap. By engineering your software to scale performance as close to linearly as possible with the addition of more CPU and RAM, you've changed the problem from one that requires the best engineers to solve into one that can be solved literally by throwing more money at it. At the largest software deployment scales this is totally doable, and it makes the most sense for the business.