I've never quite understood why one would not want the latest OS. It's free, fixes bugs, generally doesn't cause you to lose any ability to run your apps. (Generally because when Mac went from 32 to 64 bit my MS-Office no longer worked, but then the installed Apple apps are more than an adequate replacement.

You talk about all the stuff you don't care about, we'll if you don't care, why make so much trouble for yourself by not upgrading?