If I, as a consumer can't access it, it might aswell be just a marketing hoax. I will believe it when I will be able to use it. IDK why companies publish blog posts about stuff that will come out in months...
I don't think this was a job interview. I think they needed research for their own project, and they used you as a test subject under the cover of a interview for a job position. They probably tested what type of questions work best to get information from the subject in their project.
I realized with the people where I really care about leaving a good impression or hoping to become friends with, it's really hard and scary to do any kind of interaction. If I on the other hand have no desire for a friendship with someone but a chance occurs to chat, I talk to them like I know them for decades and am fully relaxed and don't really have any kind of anexiety.
Seems that the more you want something, the more you are able to sabotage yourself getting it.
It's probably not GitHub as such, but the associated memories and experiences. You never miss a place, you miss the feeling of happines you had when you were there, or the people you spent time with there.
People get emotional over a car, over a house, over a pet... you could argue for everything it's just a car/house/pet... you can get a new one.
The point is more - it's primary goal is not to enable developers to do more and better, it's primary goal is to _maximize shareholder value_. Important thing to keep in mind.