My MacBook Air had to install a firmware update, which needed to reboot. I felt kind of bad about it, because it had done 111 days without needing to restart, which seems like good going for a tiny notebook computer.
Since the fault it fixes is old MacBook Airs stopping working after a large number of recharges, though, it sounded like it was worth doing. I’m not sure I’m close to 1,000 recharges yet, but it’s plugged in and out a few times most days. Now I have to start working on my uptime record again.