For example, their notation is completely useless to me because it removes key signatures.
Not true. They specifically not on their
guide how key signatures function:
Guide said:
Key signatures still work with Hummingbird, but we put them in plain english at the beginning of the song. We call it a "key marking" and treat it just like a tempo marking. Traditional key signatures (with the accidentals on their respective lines) also work, but we only use them when there are four or more accidentals; otherwise, they add unnecessary difficulty when it's just as easy to show accidentals for each note.
What V0x said, also that different people learn in different ways.
I don't think anyone will disagree with the notion that different people learn in different ways, but it's impractical to use this phrase as a blanket statement to support your points about education. A slight difference between dots on a page doesn't qualify as "distinction of learning styles" by any means. If a music teacher decides to use this tool and claims that they're appealing to various learners, then they are a fool. I think that Hummingbird can be a tool used to appeal to different people, sure, but it is a weak one. In terms of learning styles, it falls under the exact same category that standard notation does: visual. If you
really want to be appealing to other learns, teach a piece aurally, or incorporate the music through tapping the rhythm (tactile/kinesthetic). So as an education tool, I feel like Hummingbird doesn't stack up to the host of other methods that can be utilized.
Furthermore, I can't help but feel like this is just a "get rich quick" scam with people claiming that they're revolutionizing music. I can't help but wonder who they aim to appeal to with this notation. New musicians? Here's my qualm with that argument: Hummingbird only helps when playing complex music. How much of a difference do you think this notation will make in learning
Hot Cross Buns? I'm betting that it's roughly the same. So what confuses me that the example they have on their front page is quite complex. That looks like some piano repertoire for late high school / early undergraduate. You're not going to be teaching such a piece to a primary school student; there hands probably aren't even big enough to reach those octaves!
So what, they're appealing to advanced musicians? Good luck there. We're all heavily biased towards standard notation since we've all been using it for so long. But even the mechanisms of Hummingbird has some pretty significant flaws. Note length is indicated horizontally, which is too much information. It's easier to have a whole note at the start of the measure and think, "I'll hold for four beats and check back in," while you go to focus on other notes. Note length is indicated by little tails, which can be tough to catch at a glance, unlike beams which are quite obvious. And the crap about composing anywhere? I don't buy it; this looks like a nightmare for composers, especially considering the deletion of proper key signatures in modulating passages. Finally, a lot of musicians enjoy the fact that we use (nearly) the same notation as our forefathers. It's cool to think that we read the same notes as those in our musical lineage. A tweak in the system for the sake of modernness just isn't appealing to a group of people that revels in the integrity of the past.
Overall, it just seems impractical, and I don't think it will sell to musicians, whether young or old.