This thread seems to have disappeared off the main board.
It doesn't disappear but the thread is probably a sub-category under a specific topic. Notice that if you click on a specific topic, there will be many diffrent threads within it. If someone else posts on a different thread under the same specific topic, then the latest post will be seen when looking at the main board. It took me a while to figure it out too. If all else fails, use the search function and type in enigmatic architecture, and it will take you straight to the thread.