I don't know what you consider to be a "long-time member".
Under your current name you're here since January 4, 2007, and still post.
So you're referring to those who joined earlier.
You will not know that most of the very earliest members were Robert's students, who never posted anything.
You will have missed that quite a few of the "long-time members" are ill and/or have died.
Besides that: why is that a question you are missing?
Use >Ask a Question<
and hope that those who you are missing will answer.