Currently the "enter" key does go-to-definition (which in most IDEs is something like Ctrl+F12).
But what if we had ctrl+enter for go-to-definition and free enter for other things -

In this demo by @CrowdHailer enter is used for adding let items.

Consider having cursor on stuff in this example

let something = some stuff
other things

If you want to add a let item you'd think that keys ["enter", "l", "e", "t"...] so it seems sensible for enter to be the key to add a let item there.