What is that stupid RV fastener used everywhere?

Living in salt air, I use stainless fasteners for electrical and wood. The definition of misery is to use a phillips type stainless steel fastener. Even extremely expensive 316 grade is no match for a hardware store grade 2 screw when it comes to strength and ability to defend against damaging the cross. But Robertson screws can tolerate tightness all the way up to snapping off the threads (Canadian word coming) whilst surviving high driving forces in the head.