This is just the latest decades old problem solved. You might remember Fermat’s Last Theorem and the Poincaire Conjecture in mathematics that took hundreds of years. I recall some other number theory diophantine analyses only solved recently(a couple of years ago). That problem I recall went back to Arab Spain days.

The fact that we don’t have true a.i.(we have some a.i.; just not r2/d2 or anything like that . . . yet) or Drexlerian nanotech is different than what your imagining. For hundreds of years from the late middle ages(after the Arab spain translations of Classical Greek learning was spread around Europe before what’s conventionaly considered the Renaissance period) up to the 1800s, people tried to make perpetual motion machines. Eventually, thermodynamics disproved perpetual motion machines. The fact that we don’t have a.i. and nanotech is different. We know there’s something called intelligence; we just don’t have a good definition of it yet. We’re doing nanotech right now, and as I’ve remarked already, we’ve been doing nanotech since the early 1800s scientifically.