I don’t think that’s an apt analogy. You have very little to loose by taking a few hours to spin up some new tool and see what it’s about. Even if you don’t use it, you know what it’s about and could if you wanted/needed. You don’t loose your investment in PHP by doing so. In fact sometimes new tech could inform your existing knowledge.

I do think there is wisdom in not immediately using every new thing in production, but that’s different from wanting to stick to one language and never try anything new.