Donald Knuth used to go to a secretary school to learn touch typing, and IIRC he could easily type more than 120 WPM. Yet he decided to write his books and papers first with pencil and a piece of paper, and then type them out. The reason is that he found that he typed faster than he could think, which in turn interfered with his thinking process, while writing on paper matches his speed of thinking.
I also find taking notes on paper helps me focus more than typing, but it could be just that writing slows me down so I have more time to unconsciously reflect more. I also find writing math on paper is way more effective than using a computer, but that's most likely because I'm not that familiar with LaTex, so typing out equations interrupts my thought process.
I also find taking notes on paper helps me focus more than typing, but it could be just that writing slows me down so I have more time to unconsciously reflect more. I also find writing math on paper is way more effective than using a computer, but that's most likely because I'm not that familiar with LaTex, so typing out equations interrupts my thought process.