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.
There’s a lot of things that make the Bluetooth experience better… it’s just almost all focused on mobile phones, maybe apple laptops if you stay in their walled gardens, but definitely not stock windows.
I say stock because if you do use windows and want to use Bluetooth you can improve things with a third party driver https://www.bluetoothgoodies.com/a2dp/ it’s still not great but at least you can use better codecs than default