Use the Newest Watch Faces
With every watchOS update, Apple introduces a new set of watch faces with fresh designs and new capabilities. However, there’s a growing number of watch faces that won’t work with earlier Apple Watches but will work with Series 4, Series 5, etc. That may be due to processing power or screen size – but the end result is that you’ll have a lot more face options with the latest Apple Watches, which is always a plus.
We’ll also note that for some features, this has worked in reverse. For example, early watchOS versions used to support sending animated emojis, but this was eventually phased out and hasn’t been replaced with any similar capabilities.