Wow, this is amazing! As a songwriter, the only feature that I’d really need to make it an insta-buy is always-recording audio as well (and then you bookmark it and it only keeps what you sang when you started playing, since obviously audio takes way more storage space). This is probably way out of scope right now, but just adding my feedback. The always-recording piano is brilliant, but I’m not sure how useful it’d be for me without the melodies I’m improvising to go along with it. Honestly, if I wasn’t broke, I’d invest in you building that feature (or entirely separate product?) because it’d be such a gamechanger (and then you could sell it to people who play any instrument).
Note that discouraging car ownership—and instead encouraging cycling with safe infrastructure, like the Netherlands has been doing for the last 50 years—actually dramatically increases independence for both children and adults: https://thecityateyelevel.com/stories/biking-the-streets-to-...