What happens when the app for some piece of hardware you bought is on a 3rd party store? What happens if the app is only available for iOS? What happens when a

What happens when the app for some piece of hardware you bought is on a 3rd party store? What happens if the app is only available for iOS? What happens when all your friends use iMessage and Facetime? Apple isn't saving us from platform lock-in; they're benefiting hugely from it. I don’t own any other Apple hardware, but bought my phone (after a long line of Android hardware starting from the original ADP1) specifically to not have to deal with any of this. I don’t have the time and energy to deal with any of this anymore. What is "this"? My Android phone works fine with zero maintenance, but when I occasionally want to do hacky things with it I can.