Earlier quoted context omitted.
I also found that the mere UX of a notebook makes me rework my sketches again and again, because I constantly flip through them. This made me learn faster than with unlimited layers and an undo button.
For me having a proper sketchbook only makes it harder to practice. I want every page to be nice. I've found using a block of paper works a lot better. If I really dislike a sketch I can just throw that sheet out, instead of feeling like I've ruined my sketchbook. I rarely actually do throw out a sheet, but having the option seems to make it sting less if I do a bad sketch. I guess the fact that I've purposefully aim…
In my case, I find revisions useful as a sort of deliberate practice. I eventually find the right way to do something, after many attempts. Polishing turds is a great way to see where I make mistakes and how to fix them.