Really? At some point syntax became kind of a vague sense of color on top of the data flow, which is ultimately the same in any language. I don't even recall what it means to be proficient in one language versus another—surely most career programmers can ramp up on any given syntax or runtime in a relatively short period of time. The hard part is laying out the data flow.
Granted, AI can definitely ease that ramp-up time at the cost of lengthening it.