This was inevitable, but it hadn’t happened to me before. We now have a student composing both string quartets and jazz tunes using Sibelius notation software. I found it amusing that he prints the string quartets in Sibelius’s “normal” notation and the jazz pieces in its “inkpen” script:
      
I asked him why and he shrugged and didn’t know. But it does subtly look like in the notation on the left the notes are fixed and must be played correctly, while the ones on the right are sort of just the “suggested” notes, and if you can think of something better you’re free to substitute something.Â
Years ago I used to write pieces that did have optional notes, placed in brackets or parentheses. Maybe I should notate them this way.