Your comment about iPhone build quality is as anecdotal as they come. Here's my counterpoint anecdotal take: I've had pretty much every iPhone model since the iPhone 3G, and the tiny number of issues I've had have been straightforward (a free screen replacement as a result of a publicly acknowledged issue, for example). I also work in the repair sector (not for Apple), and have seen absolutely no evidence to support your claim that iPhones are dying left and right.
When Apple do entire device replacements, this is simply because for weird issues it's a quicker and easier on-the-spot resolution for both the end user and the Genius Bar than spending days depriving the owners of pretty vital devices trying to reproduce odd issues. Articles abound detailing how exacting Apple are with suppliers, e.g:
When Apple do entire device replacements, this is simply because for weird issues it's a quicker and easier on-the-spot resolution for both the end user and the Genius Bar than spending days depriving the owners of pretty vital devices trying to reproduce odd issues. Articles abound detailing how exacting Apple are with suppliers, e.g:
https://www.theverge.com/23743095/apple-watch-band-release-x...