At times I ask a question and then get an answer. At times, the answers prompt another question where I share the link of the original Q&A . There should be a way to indicate to the original question about the new question. This way both the answerer and people who were interested in the original question also get the related question/s which were asked.
It would and should increase both the attention span as well as possibility of the new question to be answered as well.
Case in point - The latest question I asked. bootable live usb doesn't boot, KNOPPIX
This comes from blogging where people do it all the time using old links to also drive traffic to old posts as well. While this isn't supposed to hard-core commercial site, finding relevant content also is a bit difficult due to limited tag creation and finding content which is relevant to what you are searching.