[itistoday2]

Pilot wave theory has been known for decades. So can someone explain how whatever they're talking about is different/new?

[cgearhart]

Their central claim is that they found a specific instance of quantum behavior where they can represent the whole model with only classical mechanics rather than falling back on quantum explanations like wavefunction collapse, etc. We think that describing quantum systems requires quantum explanations, so finding a counterexample could be interesting.

[clavalle]

So they claim that up until now pilot wave theory hasn't been able to explain entanglement while remaining consistent with Maxwell's equations.

They are not saying they came up with pilot wave theory, only that they've removed a sticking point.