Sure but I don’t always have a desk to sit at for using a keyboard. Also, you can upload a pdf into GoodNotes and write on it where a keyboard isn’t useful there. I am an engineer so I am always redlining drawings or reports or making sketches or just making extra comments to clear things up as parts get built. My drawings get uploaded in real time and my team gets them instantly. For personal notes, I make a lot of sketches so being able to draw with the Apple Pencil is great.