[mkl]

I have a Chromatone, which has a different key layout I think would solve that problem: https://www.chromatone.jp/

Unfortunately, they are no longer for sale. I got mine really cheap, while they were getting rid of old stock.

I have commented in detail about it in the past: https://news.ycombinator.com/item?id=21842632

[a-nikolaev]

I played Russian accordion with this type of a layout (EDIT: not the same as chromatone, which uses https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard ), and I think it is superior to the piano keyboard. But the piano layout seems to be the default for almost any modern digital instrument/device, so you need to play piano anyway to use any of them. And this uniformity was not a thing in the past, when people designed all sorts of "analog" instruments (violins, guitars, trumpets, etc.)

[ngcc_hk]

I think the movement is about standard not just one or two, a bit like 4/4 1/4 etc size of violin but not just for kids.