It's one of those designs where you kind of go "ah yes, I thought that would be a good idea". But before you saw it you might never have planned it in your head exactly the way it is. The iPod was like that for me, with its scrolling click wheel.

Like getting to the platonic form of a specific type of device.

The Pi 400 is the completion of the idea of an educational computer for kids, IMO. It's not going to compete with a Mac mini or anything like that, and the keyboard is likely not going to be anyone's top choice for a 'professional' keyboard. But it's good enough in all the right ways as a general purpose computer.