[Soremwar]

Reimplement in the way that they change certain rules to accommodate a more "modern JS" feel

And they absolutely use TS for the std library, just not in the runtime itself

[junon]

> Reimplement in the way that they change certain rules to accommodate a more "modern JS" feel

What exactly do you mean by this?

> And they absolutely use TS for the std library, just not in the runtime itself

Yes, internally. The code that actually makes up deno itself is just plain Javascript.