I don't think anyone in this thread has actually opened the link. This "new home" isn't some sort of platform like Google Code, it's just a website that lists all of Google's open source projects (mainly on GitHub). Everyone's talking about it like it's supposed to be some sort of GitHub competitor that can be 'abandoned'.
I don't see why you feel like this website is something that Google can't abandon. Hell: I swear I remember Google already having a page like this six or seven years ago... I'd imagine this page will slowly become less and less maintained, with both layout rot and failing to include some new projects, until it eventually gets scrapped or replaced (with a new URL, and likely no redirect).