You Might Experience Lag When Using Your Apple Watch
If you love Apple products for how snappy they feel, this issue will make you want to avoid watchOS 10 entirely.
Some users have reported that their Apple Watches are now sluggish. This covers anything from not being able to scroll through your apps instantly to feeling lag when opening a specific third or first-party app.
Again, this issue might be caused because of the Apple Watch you have. Unfortunately, older Apple Watches won’t handle newer software updates as well as they should. So be careful when updating your older Watch. Like poor battery life, it could also be a temporary problem that resolves itself after a few days, once watchOS 10 has finished cleaning things up in the background.