I tend to think of most threads as a conversation, sometimes they will bring up other thoughts and ideas, so the topics will meander about a bit.

And at times they will stray quite far from the subject or spark a lively discussion- which may need to be moved to it's own thread.
{I am happy to do that if asked}

If anyone feels an original question or topic has ever gone too far off track - there is always the option of using the "Quote" of the original post and bumping it back to the top.