If you bought bread from the corner store then you can still spread butter from the supermarket on it. Your two purchases were independent. That's not relevant

If you bought bread from the corner store then you can still spread butter from the supermarket on it. Your two purchases were independent. That's not relevant in the phone market, where you're stuck with a specific platform once you've made your initial phone purchase. You can't use it with applications from other platforms, and switching platforms means you need to purchase all the stuff you're using all over again.