As an owner of an Android phone (Pixel 4a) that just reached EOL and for which a potential 0-click RCE 0day was just released (the webp thing), I'd take three more years of security updates on the spot. But well, I guess time for a new phone.

Pixel 6 was promising 5 years of security updates from the start. Like, from the very first announcement. As evidence, note that your link is from the time of the launch, not some kind of bait and switch like the OP claimed.

The link referring to 7 years of update. If you follow the leaker on Twitter kamila in the original leak tweet they mention it can be 5 years of OS update + 3 years of security updates or something along the lines. The leakers isn't sure if it will be full 7 years of OS updates. I think other people reporting on the leak are failing to differentiate OS updates vs security updates making people to think Google rolled back on updates.