The Sauds have never been our friends. They are double dealing untrustworthy and inept. American forces are just their hired help, their rentals. Nothing else.
It has been decades since I have been in the ME but I doubt their character or competence has changed. I doubt they could operate anything more complex than a toothbrush—not that they would bother to own one. ANY weapon system they employed would have to have Americans behind it.
I remember the Saudis in my Navy electronics classe. I doubt most could change a lightbulb without help.