Same issue Apple had when the iPod was new. How big is 20 gigs? Better put 150,000 songs instead…
There's a reason that we're banning all types of disposable electronics including vapes.
That's like, horror game flashlight levels of longevity.
It's crazy they manage to say this with a straight face when their product still costs $225. Gee, $225 for a disposable piece of e-waste or $250 for a rechargeable device... but hey, at least it reminds you with an advertisement to spend another $225 before it dies!
Also, rechargeable does not mean it is infinitely rechargeable. After around four years, the Oura's battery will not hold a charge long enough to be useful (record a night's sleep), so it is also disposable.
We are comparing apples and oranges though because the Index is not a smart ring.