The oldest post of mine that Google can find on the Microchip forum is at https://www.microchip.com/forums/FindPost/16867
which is dated "March 13, 2002". Not bad for someone who supposedly joined in 11/8/2003 !
In reality, I'd been posting on the predecessor of that forum software for a while before that.
According to this post https://www.microchip.com/forums/FindPost/305746
I had 209 posts as of Sep-2002
I'm just curious if that was my oldest post. I pretty much doubt it, but just as many of the older user's name have been lost (and replaced by "guest"), I suspect a lot of the oldest posts have been lost.