Depends on which languages you work with. Many language servers are written in their own languages so it is possible to work with a lot of native code when using VS Code day to day even if most of VS Code itself isn't native code.
VS Code also used to have far more native code earlier on in its development life, but seems to be transitioning a lot of it to WASM (paralleling the Node ecosystem as a whole moving a lot of performance heavy stuff from native NAPI plugins to WASM boxes; as one example: the major source maps support library moved from JS native to Rust to WASM compiled from Rust, IIRC).
