Reliable? I trust Tree-Sitter's grammars a hundred times more than the underspecified regex monstrosities that power highlighting in other editors.

Tree-Sitter grammars are unit tested, have usable primitives for precedence and associativity, and are generally far more predictable than previous highlighting systems.

Also, name a language for which there is no Tree-Sitter grammar yet. The only remaining ones are so obscure that the missing "fallback" is irrelevant for 99% of users.