watchOS 5 Compatibility

From Apple’s watchOS 5 preview:

watchOS 5 requires iPhone 5s or later with iOS 12 or later, and one of the following Apple Watch models:

Apple Watch Series 1

Apple Watch Series 2

Apple Watch Series 3

watchOS 5 is not compatible with the first-generation Apple Watch.

I hope the Series 4 will be a worthy upgrade over my Space Black steel Series 0.