It's good for a minimum of 3 years of updates and tech support, or 18 months after it is last sold by Google, whichever is longer. That's plenty for me, I usually flip my old phone on eBay and use that towards a new one ever 1-2 years.

It may be plenty for you, sure. But you're flipping the phones. I take it there's a market for people who want phones without security updates. That's certainly not me though. I find it despicable that the phone I bought almost 2 years ago (Pixel 3) will not receive any updates after October, and as such, I will no longer use it. But there's literally nothing wrong with the phone, cosmetically it's in near perfect condition, all the hardware works, and it's still plenty fast. As it stands, to get the max 3 years of support, you literally have to buy the phone on day 1. This is pathetic. My next phone will be an iPhone.