Eh, I see what you're saying, but I think there's always going to be a market for second hand hardware. And what new phone they decide to get, which might not necessarily be Google, isn't going to be influenced by the purchaser, I don't think.

Unless you do like people with iPhones do and you still pay premium prices for used phones... that I could see incentivizing Google specifically as holding value becomes a reason to buy them, as is true with Apple. But I don't think eliminating the incentive for a second hand market altogether is really reasonably possible, personally. May as well pull a Google phone out of the ecosystem and deGoogle it. Who knows? Maybe you sell it yourself years down the line to someone needing a very cheap phone and end up introducing someone else to nonGoogle or Apple OS's.