Each to their own. I have an Oura ring and primarily for me the benefit is sleep tracking because I can’t for the life of me wear an Apple Watch to bed, it’s just too uncomfortable and I have tried many times.
The sleep tracking managed to help me make adjustments as it showed how often I was awake, how much deep sleep etc.
Also, the HRV graph is something that watch can’t provide. Some other watches do measure HRV, but you only get a daily average, so you can’t really draw any conclusions about the shape of the graph.
I’ll take a ring over the smart watch any day. Battery life alone, makes this easier. Drives me nuts to see my coworkers, friends, dates, just looking at their watch as we chat away or work, then complain about so many alerts.
I dont know i have been waiting for some nerd to build a wand vr controller or magic controller rings because just the premise alone tickets my fantasies.
Impractical maybe, i just want someone to try and publish results.