Simple sketches of very rough ideas are much simpler for me in a notebook. Its right there when i need it, and they’ve thought me how to use a pen ages ago so i’m pretty good at it. Noting down numbers or dimensions before i can enter them to cad in their proper places is something i do quite a lot too. The built in history feature is amazingly simple but search could be improved upon. Especially if the pages are filled with random things next to each other.
The notebook is pretty resistant to drops too and i can put plates or mugs on it without risking sratches