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.
AptX over Bluetooth is lossless and has been available since 2016. Android only though.
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.