For those who can’t wait - there is a hacky/wacky plugin that implements this. Basically, that’s just an outliner functionality that was extracted and placed into the plugin to work with headers. It wasn’t placed in the community plugins section because of a lack of polishing and cross-feature implementation.
Known issue - it’s doesn’t play good with the outliner zoom feature (you can zoom in header and outliner, so like twice zooming, two breadcrumbs, etc)
I and @vslinko (outliner plugin creator) thinking what zooming functionality can be extracted from the outliner plugin and can be placed as a separate plugin with headers zooming with it).