Comment by skeledrew

At the lower 12-hour end, if you're doing ~10 seconds per recording (remember this device is primarily for very short reminders and quick commands), that's ~4.3k recordings total. Also keep in mind that you'd only use it when it's inconvenient/undesirable to reach for your phone or any other device, so it's possible this may only be used say 5x in a day at most on average (likely far less). Which means ~2.5 years worth of usage at the lower end, and you'd only ever have to take it off if going for a swim.

Contrast to a phone that, though it has far more capability, you'd have to remember where it is before even reaching for it wherever, and usually has to be on a charger for anywhere from 30 minutes (with super charging) to a few hours daily. Or even being at a laptop/desktop, and at least having to open the relevant app, type/talk into it and then close again to return to primary task. The ring is an instant win for 24/7/365 convenient presence.