Sometimes, some post ID (pid=) I have, I really cannot find the pages in the Web Archive.
When I can it is still a difficult task.
Web Archive might contain your topic with its topic ID (id=) but it might never contain it with its post ID (pid=) which we already keep as they were provided when we asked for a post permalink.
I also rely on Google search to find topic ID (id=) but as the forum is being down for long time, Google will eventually de‐index those pages.
So I have created an MBH-455 ticket to remind turning the forums back on when possible.
BTW I have just noticed that I wrote a wrong link in my original post, it should have been forums, not forum.