Is there any possibility of undeleting a post? I know it was closed years ago as not MO level. So maybe it could be undeleted and then moved to MSE? Just because it hosts a discussion which is referenced elsewhere. Thanks
While we can easily undelete the question, actually migrating it would be impossible. We can only migrate questions which are younger than 60 days.
Given that the post had been automatically deleted over a decade ago, that is over than 60 times the 60 days limit.
Undeleting the question is likely to cause it to be deleted by the bot again. So there is little to no point in doing that.