I agree with the upgrade hate on this page but ... There are lots exceptions. Instagram is a hosted image service not an app. There is an app, that app is just

I agree with the upgrade hate on this page but ... There are lots exceptions. Instagram is a hosted image service not an app. There is an app, that app is just a front end for the service. Being a service it's no different than any other service. You go into a restaurant, you like the ambiance. You go back and they've remodeled and you no longer like it. You go to the bakery and enjoy the friendly person behind the counter. They quit and you don't like their replacement. etc...