There was one case in the last 3 years that I thought about getting one. I started running and hated having to need my phone on me and needed a watch either way.
Then I went to dinner and saw how a friend was continuously and unconsciously flicking their eyes down at their smartwatch every few minute if they weren't talking and decided against it. I'm getting old...
Hard to say... butI am 100% sure that adult content would be more expensive than any useful knowledge.