olduse.net was mentioned in a thread on the fediverse recently. I couldn't help but reply with information about the current status. To my surprise restarting the replay was mentioned.
I hadn't thought about that. But why not? I have all the articles in a database , I could extract the Date: into a column, index it, and do some SQL to find every article more than 40 years old. From there the road isn't long to implementing a custom nntp daemon to serve it.
During the implementation I realized that I could easily expose a 40 year delayed archive on one port, a 41 year delayed archive on another port, and so on, until the start of the archive (currently 42 years delayed).