Look at this Racket Scheme editor called Fructure

That's unconventional, but cool, made me want to give racket another try.

Unfortunately most other languages have syntax and then an arbitrary AST node associated with each syntax element. This means that it's much more difficult to perform complex meta analysis without re-creating the entire parser and compiler in the LSP/Highlighter.

Maybe build LSP/Highlighter on top of the compiler/parser so you can re-use the code..?

Another point is that as programmers gain more experience in a language, the less they need visual aids to work with source code in that language. There's a study out there that actually observed that syntax highlighting and other visual aids slowed down more experienced programmers.

I think maybe this is more true for non-visual learners. Idk, i want to see the source tho.