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.
My experience of Bluetooth has always been settings that I can’t change, security issues, and devices that run different implementations on both ends. See ‘barely a standard’, even when the box for each reads the same standard number.
Which is why I’m so reluctant to call it a standard; it isnt standardized.