[chockchocschoir]

It doesn't actually say that at all, because you can use Copilot in different ways. One way is the way you mention, by writing code and letting Copilot finish those off. Another way is the way GP describes it (and, the technique that the article uses) where you write comments and let Copilot fill out the code.

Just because one uses one of the ways doesn't mean they are not aware of the other way too.

[ShamelessC]

Not logically, no. But it is implied because you actually get both such experiences on-demand in VS Code/vim/emacs. It's a fascinating experience and you find yourself writing more descriptive function names and variable names rather than using handwritten instructions. You quickly realize that comments are just one of many prompt engineering tricks available once you have access to this - and simply generating snippets as the linked article does is quite restricting sometimes.

Basically, the concern that e.g. comment length gets too long is a weird one, because you don't tend to actually use copilot that way if you have access to it through tab-complete.

Perhaps what I really mean is - people should try using copilot for an actual coding project. Its benefits aren't really obvious in contrived examples.