Nope… CPU and memory usage matter as well… if they get exhausted, you get throttling. This also has an impact on server-costs… Why run 2 instances of something that serves 4k requests/second over one instance that serves 9k/s (just an over-exaggerating example)
This is exactly how I feel about python as well… IMHO, it’s good for some advanced stuff, where bash starts to hit its limits, but I’d never touch it otherwise