A couple thoughts (as someone who has spent a significant chunk of time using Sibelius):
1. The keypad / MIDI keyboard input method is definitely efficient once you're good at it, but I would say it's much harder to get used to than just drawing the notation. Drawing a dotted quarter note is natural for anyone who has taken music theory. Pressing 4 (or whatever) for quarter note, then '.' for dot, then pressing a key on a different keyboard for the pitch -- it's just a pretty intricate set of steps to go through for something that would just be a few intuitive strokes of a pen.
2. A MIDI keyboard takes up noticeable space. Even though I do a fair amount of Sibelius, I don't have one in my music room -- I only have a real piano. You also need to make sure your setup has the MIDI keyboard right next to your computer, which isn't super convenient.
It's true, I'm not a professional in the sense that you mean. But I am a serious musician doing real work (some local groups perform my work, and I work on editions of old music too). If it's well executed, I'd much prefer working this way to the existing options.
1. The keypad / MIDI keyboard input method is definitely efficient once you're good at it, but I would say it's much harder to get used to than just drawing the notation. Drawing a dotted quarter note is natural for anyone who has taken music theory. Pressing 4 (or whatever) for quarter note, then '.' for dot, then pressing a key on a different keyboard for the pitch -- it's just a pretty intricate set of steps to go through for something that would just be a few intuitive strokes of a pen.
2. A MIDI keyboard takes up noticeable space. Even though I do a fair amount of Sibelius, I don't have one in my music room -- I only have a real piano. You also need to make sure your setup has the MIDI keyboard right next to your computer, which isn't super convenient.
It's true, I'm not a professional in the sense that you mean. But I am a serious musician doing real work (some local groups perform my work, and I work on editions of old music too). If it's well executed, I'd much prefer working this way to the existing options.