The installer should collect input for recipes that need it

+1

I also think that accepting input should only be done when absolutely necessary otherwise go for good sensible defaults to not overwhelm the user 👍

This is blocked by the necessary core API being added: ✨ Add a trait for forms that want to collect input on behalf of a recipe Active

The core API was added and is in Drupal 11.1.0-rc1, so this is no longer blocked. Having said that, we are not currently exposing any input-requiring recipes in the installer and I'm not sure we will for 1.0.0, so I don't think this is a stable blocker.