With a paper notebook and a pen, it's easier to record different kinds of information, such as data tables, different kinds of graphics, rough sketches, detaile

With a paper notebook and a pen, it's easier to record different kinds of information, such as data tables, different kinds of graphics, rough sketches, detailed drawings such as dimensioned mechanical drawings, mathematical expressions, small amounts of source code in addition to text. Now you can do all these things on a computer, but you will either need to switch between several different apps, or have one very large, complex and likely costly app.