Tom Brown wrote:
What about major upgrades? If I keep the system updated regularly, is a major upgrade necessary?
Gentoo doesn't have major upgrades so you should be fine. But as you can imagine, you need to give a Gentoo system more love than a Debian one (which is pretty much "set it and forget it") due to it's "rolling release" nature. But since you have Gentoo on your desktop, I'm sure you know your ways about updating and carefully reading emerge logs ;)