The (somewhat) new-style computer keyboards may look compact and pretty but this is a case where fashion impairs function.
Improved accuracy:
The tactile response from a keyboard is helpful. At the highly-practical level, a keyboard with well made and easy to punch keys decreases the number of errors we write and, thus, increases speed typing.
Improved rhythm:
Writing is challenging and, like many human-pursuits, is easier when you figure out a way to find your rhythm. This is easier when you not only have a better tactile response but also better when you have louder keys — a better audio response!
I am reminded of a few scenes from the movie Finding Forresster that speak to this:
More good advice on writing: “The first draft you write with your heart. You rewrite with your head. The first key to writing is … to write! (Not to think.)”