Appears to be 7 years on 8's and 9's

Frequently Asked Questions | GrapheneOS

Hopefully that still holds true in the light of recent news. I expect that it will, but it will be good to get an official confirmation. Many people are uncertain as to whether they should buy a Pixel to run GOS now.

What news did I miss ( I just bought a new pixel to run GOS recently...)?

It's in the original post at the top of this thread. :)