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.
Every time it comes up I must lament the switch to screens too tall to watch content, the decision to remove wired 3.5mm jacks in order to drive sales of wireless headphones, the switch to increasingly fewer physical buttons. No more IR blaster.