Safe to update Home Assistant OS to 3?

I’ve never seen a message before about upgrading the Hass OS. Where was version 2? :rofl:
I’m a bit wary of pressing the upgrade button, having got myself into all sorts of scrapes in the past with broken installs following updates gone wrong. Is it generally thought to work OK? Is it a case of if it ain’t broke don’t fix it? Or would it give benefits like faster boot? Thanks!