How can Wilson Audio speakers sound that good if they are using OEM drivers?

I understand you all. And agree with you. I’m just confused about some companies not pushing boundaries on drivers too.
One thing is to ask another company to develop a driver with a spec. Another is to R&D on drivers, as I understand Wilson Audio does with the their speakers enclosures. Wilson do a kind of crazy R&D with the materials they use on their speaker enclosures. And I love that. But what if they did this also with their drivers?

OP:
Have you listened to any Wilson speakers? If so, please elaborate.

Kost 

I don’t recall any Wilson with a Focal midrange driver - the first ones used a Seas inverted surround - Focal Kevlar tweeter Dynaudio poly woofers - which maintained through the whole WP thing. 

From the WP5 up the midrange was ScanSpeak 18Wx5x5 and the Focal inverted laminated TI dome. 

Good listening 👂 

Peter