The release dates of the first Apple Watch was 3 years ago on April 24, 2015.
iOS 12 will be compatible with the iPhone 5s released on September 20, 2013. iOS 12 will be the OS until September 2019. So the OS compatibility is 6 years.
watchOS 5 doesn’t support my first generation Apple Watch after 3 years already.
Apple, I‘m very much disappointed.