There is a lock-in. We invest a lot of time in learning an ecosystem with a very specific programming language, quirks, rules, practices, problems - oh, and th

There is a lock-in. We invest a lot of time in learning an ecosystem with a very specific programming language, quirks, rules, practices, problems - oh, and the AppStore approval process. On top of that, one day we suddenly discover we also depend on the availability of Apple's cert server. Customers/consumers are not locked in in this regard, and generally they don't care whether or to what extent developers are.