They do not treat hub as an official github project and rather an unofficial open source project that they don't plan to do away with

They have a document where they expand on this: https://github.com/cli/cli/blob/trunk/docs/gh-vs-hub.md

To highlight from that doc:

"The GitHub CLI team is focused solely on building out the new tool, gh. We aren’t shutting down hub or doing anything to change it. It’s an open source project and will continue to exist as long as it’s maintained and keeps receiving contributions."

Farther along in same doc:

"hub is a project whose maintainer also happens to be a GitHub employee. He chooses to maintain hub in his spare time, as many of our employees do with open source projects."

My experience at FANMAG has been that "spare time" is the scarcest of all resources.

hub was also a github project. Somewhere there is a blog post or something explaining the relationship of this to hub -- basically, they wanted to start over with new architecture and new thoughts, and a more clear organizational commitment to it (even though hub is at `github/hub`, it is github-owned code).

There is no particular plan to phase out hub, but once github CLI covers enough features, I'd expect people to switch over to it.

I think the creator of Hub works for GitHub, possibly on the CLI IIRC.