[JeremyNT]

> Do people allocate a certain amount of time just to upgrade Rails?

Rails spits a bunch of deprecation warnings when stuff is changing. Usually it's just a matter of playing whack-a-mole with the deprecation warnings and walking through the upgrade instructions. It's a chore but it's not especially difficult, even if you're multiple versions behind (in which case you go should upgrade through the intermediate versions one at a time).

The thing that will save your bacon here is having decent test coverage, so you actually see those deprecation warnings :)