if everything went into one area then the turnover of the page would be huge, i can understand your questioning about it and also why it was moved. at least in the car specific forum someone might think oh yeah that could be ...
where as in gd it could just goto page 2 with no replies and then have to bump it back up, that moves another thread off into page 2 then the poster bumps that,
if everyone did that then it would be chaos and people would complain about how threads need constant btt to be seen.