>> … stable … about every 6 months.

> Maybe slightly optimistic.

The longest without rebooting two prod FreeBSD servers I was once responsible for, including applying userland patches, was roughly 3000 days (just over 8 years).

My DigitalOcean FreeBSD droplet chugging along: 7:25AM up 1707 days, 15 hrs, 5 users, load averages: 0.30, 0.21, 0.17

Too bad they dropped support for it.