[crucialfelix]

True story. To mitigate this all of Atom's core are implemented as packages that you can disable or completely replace with other versions.

Basic things like https://atom.io/packages/find-and-replace

Facebook's nuclide project replaces a bunch of core features like the tree-view and the quick file opener.

> let's pull them into the core

That doesn't actually happen. They may adopt a package or publish a more official version of a package, but all major functionality is in packages.