With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
Hard disagree that earbuds negate codec importance. I love open-back over-ears, but one of my best pairs of headphones are Moondrop IEMs, and I can hear differences in audio quality more noticeably on them than a lot of speakers. I very often plug them into a Bluetooth receiver for semi-wireless convenience, and I can absolutely hear the difference between LDAC and SBC.
However, yeah definitely agreed that $150 is fair for what’s being offered here. Limited codec support is common (if unfortunate) enough in similarly priced gear without the other benefits these bring, so I’d say it’s fair enough unless the drivers themselves are bad.
I meant to say wireless earbuds but yes you are correct