Coherence is a v. nice concept for thinking through the evolution of complex (as well as merely complicated) systems.

And this is where the true complexity of decoherence becomes clear. When we try to make changes to decoherent systems, it requires far more expertise and skill than working with either system alone. The engineer working on the system needs to trace and understand it much more thoroughly and carefully, because their changes may have unintended consequences. (And yes, I count plumbers as engineers, at least as much as software devs. Have you seen them think through pressure forces in drain pipes in real time? It's remarkable.)

The Decoherence Trap: When AI slop drowns out the signal in an endless sea of noise ↗