A $3 calculator today is capable of doing arithmetic that would require superhuman intelligence to do 100 years ago.

It's extremely hard to define "human-level intelligence" but I think we can all agree that the definition of it changes with the tools available to humans. Humans seem remarkably suited to adapt to operate at the edges of what the technology of time can do.

> that would require superhuman intelligence to do 100 years ago

It had required a ton of ordinary intelligence people doing routine work (see Computer(occupation)). On the other hand, I don't think anyone has seriously considered to replace, say, von Neumann with a large collective of laypeople.