Imagine meeting someone else with a pixel phone, talking about how cool it is, then you bring up how you have a custom OS to block google and tracking from your device.

If they are interested, you can offer to just plug your phone into there's, press 3 buttons, and presto, their device is free

(Well, you have to imagine it. I didnt meet a pixel user here at the bar, but I did free another device for me to upgrade to.)

And of course, even if they decide to free their device, they have to loose all the data on it, so you will need to have a few spare USB-C to USB-A drives on your keychain for them to borrow. Then it might take a while to back up data, 30 minutes to flash GrapheneOS, then EVEN MORE time to teach them how to install apps and such, so it will take a while...

But it is technically possible...