I want ALL my applications to get timely security updates, and not just whatever their respective upstream projects care to support.
That's fine, you can have it. In fact there are dozens of distributions which cater to the people like you. The problem? 97-98% of users (Ok, let's be generous: 95% of users) don't give a damn—but they want to play new game the day it released and they want to install new "CoolApp" right after they read a review on a newssite.
The fact that Linux desktop caters to the people like you is great: I'm pretty sure that's why the Linux desktop market share is stable (if minuscule): such people have no viable alternative. But maybe, just maybe, it'll be good to offer something to the rest of the pack?
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds