Why are thread archived so quickly?

[CampWhippet]

Hardly any point in spending the time to find the subject and post it here if it's moved in less than 48 hours to a place no one can comment on it and many won't even see.

[dad2paisley]

campwhippet said:

Hardly any point in spending the time to find the subject and post it here if it's moved in less than 48 hours to a place no one can comment on it and many won't even see.

Some threads just end sooner then others or draw no interest.
That's the way it goes sometimes.