- I don't have a continuously running notebook server. I start it when I need to and shut it down if I won't be working with it for a while. I do like the idea of clicking an icon and starting an app.
- Modern command palette, I believe, is similar to what you would see in apps like VS code. It doesn't offer more commands but instead make it easier to find and execute commands. I don't use Jupyter Lab so I don't know if it has a command palette but Jupyter Notebook doesn't so that seems like an advantage to me.
- I disagree on the formatting point, too. Even if I am just doing something very quick I cannot stand seeing lines extending some length, no space after a colon, single vs double quote inconsistency etc. So I do spend time formatting them even if I am on IDLE and know for sure I am not going to save it. Thankfully, IPython added support for Black so it is less of an issue for me.
Apps in this area generally focused on extending Jupyter to maybe combine SQL/JS with Python, making data exploration easier but I do appreciate a light app that just gives me a notebook experience with some small advantages, especially considering Classic Notebook is going to go away soon. I'll definitely give it a try.