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.
Musicians (at least in studio) tend to use wired for the quality, which just does not exist in wireless. Less a latency thing. Live performers tend to use a monitor (speaker pointed back at them) AFAIK.