I have noticed a trend among younger native speakers of English to use the proposition(s) "off/off of" in place of "on." The most common one is the verb base. I have just heard it with go, which I can accept. An example would be "I have nothing to go on," which in the newer form would be "I have nothing to go off of." Another verb is build. My question is whether others have noticed this as well. It appears to me that this lexical change will become normal pretty quickly.
I've noticed go off where I would say go on, meaning happen, as in "What's going off?". I started noticing this about twenty years ago, soon after I moved to Yorkshire, so I wasn't sure whether it was a change in English, or just a Yorkshire expression.
I haven't noticed the others, but I can quite imagine them: they seem to me to represent a change of metaphor from BUILD UPON to START FROM (off of = from).