[plus9z]

Really? Then how do we have progress? I mean, I prefer current notation, but who's to say that this is the best possible notation to express musical ideas? Although Hummingbird isn't going to supplant it for a lot of reasons, there may be a better system that will.

[tosic]

We do have progress by fixing broken things and by gradually improving working things. This did happend already over (quite some) time with the current notation.

[plus9z]

Not all progress is gradual. Sometimes we need a complete overhaul. In this case, I don't see the need, but if there is something that much better than current notation, then I would hope that it does supplant this.