The thing about "functions should be X lines long" is that an appropriate value for X differs substantially from industry to industry, language to language, and

The thing about "functions should be X lines long" is that an appropriate value for X differs substantially from industry to industry, language to language, and domain to domain. My game code (mostly C#/unity stuff) often has longer functions with more commenting, whereas my server code (Go stuff) has virtually none of this. I definitely write 100-line long functions with lots of commenting in C#. I never ever, ever do that in Go. Maybe I would if I was writing a game in Go, but for Go I'm writing servers, and I never ever wind up with code that looks that way in server code.