This looks cool, love the API.
I don't any support for lifecycle hooks (eg. something like onMount when the returned node will be attached to the document) in the component api. In absense of those, I imagine integrating with vanillajs libraries will be difficult (eg. codemirror, slickgrid etc.) Curious what your thoughts in the matter are.
While in a rendering scope, `getParentElement()` will get you access to the raw DOM element. As long as you don't detach/move it, you'll be fine letting third-party code loose on it.
Aberdeen has one life cycle callback: `clean`, which is called right before rerunning or destroying a scope.
I think that's enough for just about anything you'd want to do.. ?