This is a fantastic idea. It's like the 100-in-1 electronics kit of the embedded world. The compatibility with existing popular embedded boards is just icing on the cake.
It makes me uncomfortable seeing the the phrase "learning to solder" used as an analogy to "learning to code". Soldering is actually a very trivial process and has little to do with learning about circuits. One can build a circuit without having to solder anything.
Maybe it's time for another phrase? What about "learning to wire an op-amp" or "learning to design a circuit"?