Yes. More generally, it should be "the sort of thing you can imagine investing a career in". Does anyone really plan to invest a career in building expertise in Golang (for instance), outside of the small group of people who actually work on the language itself?

(Being a PL design & implementation expert --- not "having very good taste in PLs"! --- seems like a defensible position in the market, except perhaps that there are a lot of people who want to work on compilers and you're competing with a healthy pipeline of them.)