Pen & paper provide the opportunity to use the full 2D plane for laying out your thoughts. I find this extremely valuable during conceptualisation, for sorting

Pen & paper provide the opportunity to use the full 2D plane for laying out your thoughts. I find this extremely valuable during conceptualisation, for sorting ideas, finding and highlighting connections etc. Typing however is one-dimensional. Thoughts need to be serialised in order to type them out. Sometimes this is exactly what you need. For example, a linear narrative tends to make it much easier to explain your ideas to others. And of course code is just a serialised version of a program.