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.
Removed by mod
They probably calculate cost saved by economy of scale, vs profit generated from planned obsolescence in other markets.
Might be more profitable to run different SKUs.
The EU is a relatively large market, and it wouldn’t make economic sense to develop and produce EU-specific devices. I’m pretty sure you’ll also be seeing replaceable batteries.