The people within your “age bubble” definitely continues to grow until you are roughly in your mid 40s. But then it really does just drop off hard and fast after that. There’s things you can do that also cause it to swing wildly.
Move to Boston - it’s the largest concentration of 20 year olds in the world per capita. Nobody exists over the age of 30 until you are 5 suburbs out of town. So if you are under 30 you just artificially spiked your age bubble up to probably your lifetime peak. If you are over 30 you just prematurely fell off a people my age cliff.
Move to Florida - dead opposite problem.
The temperature based cycle tracking the smart ring has is a decade ahead of what the watch is able to do. My wife has an Apple Watch and still uses and prefers her oura ring because of the cycle tracking
It’s more accurate than other thermometer based cycle trackers mostly because you never take it off and it gets significantly more data points throughout the day at very consistent intervals than something like the Mira or into.