Because consumers value the Apple ecosystem and UX, both of which you can take advantage of as a developer. What is the problem?

The problem is that after a decade, my choices are to continue to spend money at Apple, or spend even more money and time to leave Apple, go somewhere else, and buy all the apps I already own, all over again.

When I first started, I used to think of Apple as the best option available to me. Now I think about it as the least bad option. The cost of leaving involves so much time and money, that it’s not a realistic option.

That's... life.

DVDs come out. Now I have to rebuy all my VHS movies on another platform...

No you don't, you can buy a VHS player and keep using it without throwing out your TV. Or buy a combined DVD/VHS player. The only reason to buy DVDs is because the quality is better. You're getting additional value for your purchase, beyond the artificial restrictions of a mega corporation.

Hilariously, I did replace all my VHS with DVDs. I didn’t make that mistake a third time with blurays.