This is the only vbulletin run board that I visit, so I don't know what others expect. I do, suspect that TFL is far larger than the average vbulletin forum.
That said, the system we're using now requires a lot more memory to pull it off. In essence, it customizes the "read/unread" list for every member individually.
To make it endlessly persistent for each member would require an exponentially expanding amount of memory, and that's simply not going to happen.
Finally, there IS a way of seeing new posts.
Look above the message window area to the blue bar. Look in the center bottom row and find "New Posts."
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.