years of developing in one chronicle ? no
new chronicle new bugs + im sure they did not work 24/24 , in 24/24 they did not spent more then 3 months in 1 chronicle, as you can see they dont spend more then 5 months for one, if they will work 24/24 this 5 months will become 3.
today most of bugs are already fixed, but in diff packs so, all you have to do is to collect all the fixes and put it in one project.