The idea that software somehow ages like a fine cheese is nonsense. This rubbish is peddled by Linux distributors that have boxed themselves into a corner through the failure of initiatives like the LSB. The reality is that if you're running old versions of web browsers (and some other kinds of security critical software) then you are not using software that's more "stable", you're running old software that has known bugs and missing upgrades to the security architecture.
Anyway, I can't be bothered arguing about this. The gigantic screwup that is Linux software distribution is something I sunk too much time into years ago. Fortunately now we have Android that gives a second chance at a working open source OS.
1. The bleeding edge is usually defined as the newest. Almost all bugs start their public life in a bleeding edge version. If you were right, new versions would only ever reduce the bug count and never make it worse. I don't buy that, except for comatose projects, surely not healthy ones.
2. Are you serious? Android is another Linux Distro with custom frontend and some special hardware drivers. I don't have time to feed trolls.