While space is not running out and SO could keep everything this is SO's advantage. They don't. they reject the chaff because it is clutter. you go to SO links

While space is not running out and SO could keep everything this is SO's advantage. They don't. they reject the chaff because it is clutter. you go to SO links because you know your odds are good that if a question is answered there one scroll wheel away is the real answer. Not 10 pages of forum away. Letting everything stay is like adding pages to forum posts. all noise.