I too have switched from my big hardcover Leuchtturm1917 A4 to using "just" Emacs and org-mode for all my notes and TODO items.

I used to have a really nice system for writing bullet points that described the item: dot for new item, arrow for pushed to next day, check/tick for done, star for important, cross for cancelled, etc etc. I just really wish all that stuff would appear automagically in my Emacs org-journal folder. I haven't tried an iPad pro for writing, I just have the 10.4" normal iPad and don't like trying to write on that. It's compounded by my preference for super-fine pens, so tablet-based writing just feels so clunky.

I'm not sure what point I was trying to make there. Maybe my need for more coffee this morning?