[justinmchase]

It did still partially work but there was some friction with resolving types from ESM modules. For example in typescript+node if you're importing another module with esm you'd still have to import javascript like so:

``` import { Example } from "./example.js" // the actual file is example.ts ```

While in Deno you actually import the typescript file ``` import { Example } from "./example.ts" ```

That difference alone was enough to trip up the built-in typescript language tool and add friction.

Another thing is that Deno has a built in formatter / linter, you don't use a 3rd party tool like eslint, so having the ide just know how to do the linting and formatting is nice, the default typescript language plugin can't do that.

Also, Deno formats other file types including json, yaml and markdown.