Most of the Arduino Nano clones on the market have already been substantially or completely redesigned. It's a pretty trivial board, in all honesty; given the desired pinout and dimensions, a skilled designer could probably turn out a Nano clone in a day or so.

The Arduino Pro board in question here is substantially more complicated, but I wouldn't call it particularly innovative either.

There's that, but there's also people doing a better job of keeping hobbyists happy, without going bargain basement. Teensy, for example, has what I think is a better product at a better price. Also ESP32.

yup, but the official nano is 20eur + tax +shipping,... so yeah... sadly, if you're just a kid who wants to learn electronics (=if you dont have a large hardware budget), buying 3 nanos, frying one, half-soldering the other, and actually using the third is still the best option.