Had no idea Google had a VPN. I don’t know why anyone would use it. As if their other data gathering methods weren’t enough. Imagine funneling all of your internet traffic through them.
A refresher: Google runs world's largest public DNS resolver, builds a browser used by 3b+, and an OS by 2b+. If they need to harvest data, they most certainly don't need a VPN (and may be that's why they killed it).
Tom Scott said it better than I could: https://www.youtube.com/watch?v=WVDQEoe6ZWY