I have it on all my devices, but I couldn’t figure out where to go to get it set up on the watch.
I know other people may feel differently, but I think the monthly AppleCare payments make it so much more palatable to buy the AC. It’s just hard to drop that additional chunk when buying a new item, and I also like that you can just cancel it when you sell or trade in the device. It’s made it much easier to keep AC on all my grandkids’ devices as well. Since I always have little charges here and there from iTunes, App Store, etc., those $4-5 charges don’t really get noticed.