Andecdotally, javascript developers are all about 2 spaces, rather than 4.
But DevTools defaults to 4 in settings. And also in a few other spaces within the tool that don't honor the preference.

Here's some data showing 2spaces are the developer base's go-to.
https://hackernoon.com/what-javascript-code-style-is-the-most-popular-5a3f5bec1f6f

Let's change the default and also fix the places where we don't use it. (auto-indentation in console, etc)