I'm genuinely curious -- what is the thinking behind "too long to be put as code comment"? I've never heard that before.

It's not like we're conserving paper. And syntax highlighters helpfully give comments different colors so you can skip over them while reading.

Personally, I've never once wished that a particular piece of code were less commented, but there are hundreds if not thousands of times I've wished that there was more explanation, or any at all.