Poured Sockets

[P38]

I am curious as to why poured sockets are seldom used on yacht rigging. My understanding is that they are highly reliable (the only termination allowed for use on elevators). They're commonly used for testing wire strength. They're relatively inexpensive and are reusable. And in my opinion they're easy to make up. So why are they not more commonly used on yacht rigging?

Regards,

Paul