iOS 15.8.7 was released a couple weeks ago, with support going back to the iPhone 6S.
WatchOS 8 was just updated with new certificates, so that Series 3 and later watches can continue to function with Messages and FaceTime come 2027.
If such a device is just used for texting, it doesn't need to have any cell service at all, as long as it has a net connection.
Good luck getting such support out of a consumer grade router. A cynic would say that by the time the firmware is finally stable in the product's life cycle, it's time to push the next new widget. Rinse and repeat.
WatchOS 8 was just updated with new certificates, so that Series 3 and later watches can continue to function with Messages and FaceTime come 2027.
If such a device is just used for texting, it doesn't need to have any cell service at all, as long as it has a net connection.
Good luck getting such support out of a consumer grade router. A cynic would say that by the time the firmware is finally stable in the product's life cycle, it's time to push the next new widget. Rinse and repeat.