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.
That’s the only benefit I can think of, the reverse charging on phones (which is very slow). They could add that feature to the usb port though. I mean the dock thing sounds alright I guess, but I just plug my phone in, then it’s charging on desk and in hand and it only needs to be in for like 30 mins and it’s full charged.