I think its the best device they've ever made. It is just stunning to use. It takes a week or so to re-train yourself to it. Once you do though, there is no going back.
If you are asking if they use their phones with the same cluelessness for good user habits that casual computer users had towards mid 90s era computers, then yes.
FWIW, I've had a lot of success helping family members with sluggish phones by backing up their phones to iCloud and then doing a wipe/restore from cloud backup.
Absolutely fascinating review of the Apple watch from Ray Maker. So many interesting tidbits about the wearables industry in general. This is well worth a read.
https://www.dcrainmaker.com/2017/11/apple-watch-series3-cellular-fitness-sport-review.html