Thanks Google. Even with your $400 trade in refund, I think I'll stick with my original Google Pixel XL and forego marginal improvements and no 3.5mm jack on the phone itself. Forget your USB-C->3.5mm plugin... it's a pathetic attempt to move us away from wired to wireless headphones which never will work as well as 3.5 mm headsets/buds.
In fact, if you don't shape up in a year or so by the time I will upgrade, I'm probably going back to Moto, or getting a Samsung...