Question to developers about upgrading

[smhardesty]

I'm going to pose this question primarily to the developers, but any of you guys with loads of Linux knowledge chip in too. Over the years that I have run some flavor of Linux, there has always been a mild disagreement over whether or not to do a version upgrade. The three trains of thought are, 1) Never do an upgrade if your computer is running just fine, 2) Doing upgrades is the smartest thing you can do because of improvements to the distro, and 3) Only do an upgrade if it is a major release version as in from 3.4 to 4.0.

So what do you developers think the is the right thing to do? My laptop is running so smoothly I'd sure hate to do anything to jinx that. Any and all opinions welcome here.