> Interactive editing and debugging is limited to top-level code.
Very true. When programming in jupyter notebooks I often put off wrapping my code in a function because it becomes harder to interact with and debug. But this obviously becomes problematic when you want to leverage code reuse and abstraction.
In order to tackle this (somewhat) I made a tool [1] which allows you to take code anywhere and get it back into a jupyter notebook and make it top-level (e.g. function function/method and loop bodies).