Kind of an aside to your points, but I opened Yelp on my iPod Touch (first gen) and was flabbergasted to see that despite being un-updated and on an ancient ver

Kind of an aside to your points, but I opened Yelp on my iPod Touch (first gen) and was flabbergasted to see that despite being un-updated and on an ancient version of iOS, the app still worked! This is pretty amazing, given that most companies' API endpoints from ten years ago don't still work today :)