It can help water proofing but other than that I see no benefit to the end user for the removal of the physical card. It makes swapping phones a lot harder and leaves it at the mercy of the cellular provider. Apple always put profit ahead of user benefit.Apple claims to have done a lot of work around this. I look forward to seeing how it works. It’s rare for Apple to make changes that make the user experience worse. Hopefully it’s an even better experience.