Apple introduced a change that make a developer removing their software from the market be more damaging than it used to. Say that I buy a piece of software an

Apple introduced a change that make a developer removing their software from the market be more damaging than it used to. Say that I buy a piece of software and receive either an installer download or some medium containing the software. The company removes it from the market. I can still perform new installs of their software. I buy something from an app store. The developer removes it from said store, making it inaccessible for future installs. This developer did the same thing that the other one did, but I'm worse off. How is it more the fault of the developer than Apple/Google/Amazon/Microsoft/Valve/EA/etc? Who changed the way that software distribution works?