Triggered AppleCare replacement for the iPhone 14 Pro. While the shattered back was bearable, the main camera started showing artifacts. Overnight delivery is good but the factory flashed SW (iOS 17.5.1) is so far behind that the migration flow is completely broken. New phone knows it needs an upgrade, but that upgrade flow assumes it is a single step process(Current phone is at 18.1).

From my Telematics/IoT experience, that choice is Harikiri rather than Seppuku.

Had to treat it as a new phone setup, get it to 18.1, wiping it and then finally initiate migration. It was a method ( using DFU and IPSW) I used in the past when I was running iOS Betas but it looks like it still remains the best way to migrate.