I think there’s a further subdivision of “hard” which is the fundamental research stuff that pushes the boundaries of CS. Then there’s business problem stuff that’s hard because of scale, surface area and general messiness of the real world. Although the IC salary peaks might not be as high, there is more money overall in the latter, and it’s not as much about raw intellect as it is about moving up and down the abstraction layers, thinking things through and translating technical trade offs to laymen.
