> I'd be more inclined to [s]ay that let mostly encourages you to write zillion-line functions (instead of lots of small ones), simply because with it you "ment

> I'd be more inclined to [s]ay that let mostly encourages you to write zillion-line functions (instead of lots of small ones), simply because with it you "mentally can" since you can see the scope of variables better. That’s true. I revise my comment as "Any piece of code that uses a variable[ to hold something you use multiple times and don’t want to recompute]."; for example creating an API client then using it twice.