I think that the idea (before they add the memoization that the docs mention) is that this only serves as a way to name a computation, so you don't have to litter the same logic in multiple places but can instead just call the lambda instead

Edit to add:

> Why use React style capitalized names for components, like App instead of app? It's a bummer when framework breaks a languages style conventions.

I understand the remark, but on the other hand I also don't mind it; even like what they've done. I think it's useful as a signal that this this is component code, and has the added benefit that it looks familiar to other frontend code