I always hear that the choice you present is what allows anti-competitive behavior. But does that hold true even when the costs of switching is enormously high

I always hear that the choice you present is what allows anti-competitive behavior. But does that hold true even when the costs of switching is enormously high? With Target/WalMart you don't have to re-buy a $650 phone to switch. You don't need to (maybe) switch carriers depending on needs or offers with all the hassle and fees that might entail. You might have to re-learn an entirely new OS. How much time does that cost someone in lost productivity or just time in life?