You've done well managing your purchases and returns. I've done the opposite.
Since 2014 I've bought and sold 7 Porsches, 4 Raptors, a Platinum, 2 Lexus, 3 Hondas. And I've lost money on each and every trade in. Yet, I'm still smiling every day like a butcher's dog, still eating prime steak, still paying my bills, still working, earning a decent living.
My point? So what. If the OP has to ask and is so concerned about depreciation on a vehicle, he's got other issues to be concerned about. A vehicle is a rock dropped in a pond. its value sinks. Who cares? Buy once, cry once, and enjoy every mile.