I do wish an editor (heh) had added Gary Bernhardt's ideas[†] about multiple sorts of syntax highlighting for different purposes. Specifically, highlighting only variables as to the scope they belong to, another nice one could be highlighting pure and effectful function calls differently. Or highlighting the names of modules/packages/whateverthelanguageuses in distinct colors at the top of the file, then using the same color for every name which came from that package, underlining imports which aren't being used.
I would cycle through such a collection rather frequently, I suspect.
[†]: https://www.destroyallsoftware.com/talks/a-whole-new-world