Well, we started prioritizing code cleanliness over everything else and throwing away good tooling because it was old. Blocking performance optimizations becau

Well, we started prioritizing code cleanliness over everything else and throwing away good tooling because it was old. Blocking performance optimizations because they're "unmaintainable," or just not thinking about resource usage, is going to result in bad software. I'd bet Slack, for example, has all sorts of abstraction and indirection layers in it, making it impossible to figure out the fastest way to do the job.