If people like Rob Pike and Linus Torvalds are on the opposite end of that spectrum, you might be interested in why that is.
I strongly suspect the older and more experienced a developer is, the more likely they are to code without syntax coloring, including large numbers who previously didn’t.
I have synesthesia and so get syntax highlighting for free.
I like my highlighting to give me "synesthesia bootstrap speedup"; on the contrary it annoys me when it clashes.
It's an extreme case, but I presume as with most things there's a spectrum