This isn't made by developers, that's clear, and I don't think it's going to be very functional. However, I do love the aesthetic and I do love that someone is trying something new.
I’m sorry; none of this is new to me except the absurd price tag.
Historically I've done some heavy spreadsheet work where the resting position of my hands which minimizes movement is right hand on the mouse, left hand on the 10 keys. On a normal keyboard that has the disadvantage of causing a "closed" posture which isn't entirely comfortable.
Outside of that kind of niche use case though, it definitely feels like a strange choice for developers.