Definitely would like a source for this because I feel like I hear it a lot and I don't believe it's true.

You can be talented and not care what you work on. And if all you care about is what tech is new and shiny, how talented can you be? I don't want you rewriting my product every year so you can use the next framework du jour.

Maybe talent means something else when nothing is at stake, but I'd argue that a talented engineer knows that when a product works and makes money, and the tech stack isn't prohibitive of those goals, it doesn't really matter what it's written in. In fact, I see trend-chasing developers as liabilities, because they're the ones who will replace everything every six months while you bleed money.