One benefit is that you don’t have to write a complex tree sitter mode for every editor. You can write an LSP server once and plug it into every editor. Rust a

One benefit is that you don’t have to write a complex tree sitter mode for every editor. You can write an LSP server once and plug it into every editor. Rust analyzer also provides compilation errors, lints, and code actions. It would be a lot of unnecessary work to implement and maintain these functionalities five times in five different editors.