That kind of innovation is not always for the best. As an example, after hearing so much praise about the kuru-toga mechanical pencil, which rotates the lead as you write so it stays sharp longer, I went and bought one. I hate it. The rotation mechanism means the lead doesn't stay in place but has a weird "give" to it, which I notice every time I raise the pen and put it back to the paper. It's very small, a fraction of a millimeter, but it is noticeable and distracting. For me, the cure is a lot worse than the disease. I went back to my 10-year-old Pentel P205 which is stable as a rock.