They could be a while off removing the Lightning connector. An Apple support article went out this morning for owners of devices bricked by the iOS 10 update that was literally "connect to iTunes".
We experienced a brief issue with the software update process, affecting a small number of users during the first hour of availability. The problem was quickly resolved and we apologize to those customers. Anyone who was affected should connect to iTunes to complete the update or contact AppleCare for help.
Not to mention AppleCare still requires users and technicians to connect to iTunes and perform a restore of a device as a first point of troubleshooting for almost everything from hardware issues to app crashes.
So the device would need some means of connecting with another device for troubleshooting and to restore even when it isn't capable of starting into iOS, or any future iPhone issues will require whole unit replacements no matter how small or otherwise easily resolved the issue may be.
At the moment if an Apple Watch needs a software restore, we have to send it away for a complete replacement as it isn't possible to do so. That's a several hundred dollar exchange if the unit isn't under warranty.
It presents an interesting challenge.