Migrating posts that are older than 60 days is hard and it's that way intentionally.
Migration works best as a way to salvage good but off-topic questions and give them new life on a site where they can thrive. But shuffling old, answered, on-topic questions around for the hell of it is a waste of everyone's time.
Therefore, I think the real solution is much simpler: just disable the migration of old questions. They're rarely welcomed or heavily improved post-migration, often overtly disliked by folks on the destination site, and can end up causing a rather bad experience for folks who were participating in good faith on the original.
This was implemented back in 2012.
There was also a statement from Adam Lear shortly after it was implemented here:
One of the key guidelines for migrating questions (after "don't migrate crap") is "don't migrate old, answered questions".
And it continues:
- We will do a one-time mass migration of the questions that make the cut. This has some additional implications. For example, your front page on the smaller site will be more or less destroyed for a bit, so make each question count.
Once this migration happens, the topic is closed. There will be no more discussions, migrations, exceptions, etc. where old questions are concerned. You're free to still edit and migrate new questions if needed.
What happens if some of the questions you wanted don't get migrated? Just treat the original site like you would any external blog. If someone asks a similar question on your site and you're certain that you can't do better than the original version elsewhere, summarize it, give credit to the author, and link back to the original.
(Note that they don't really do this any more, it's only relative to this question about why it hasn't been done)
So, between it being practically difficult and it being against policy, and I'll add to that, time consuming and low priority...
We keep them here.
There are no migration paths set up between Meta Stack Exchange and Meta Stack Overflow.
In fact, there's not even an option the way there is on all other sites to migrate anywhere, likely because there is no meta Meta Stack Exchange.
So... that means that users have no way to close and migrate to Meta Stack Overflow because not only is there no migration pathway for Meta Stack Overflow... there's no migration option.
This means that the only way something can be migrated away to any site, Meta Stack Overflow or not, is for the Staff to do it - the developers and community managers who have diamonds on Meta Stack Exchange are the only people who can migrate questions away from MSE... and they do, occasionally:
You can see there have been 18 sent to Meta Stack Overflow, two to Stack Apps, and one each to Server Fault Meta and Physics Meta over the last 90 days.
In that same 90 days, 63 questions have been closed as "pertains only to a specific site".
In the grand scheme of total questions closed, that's pretty low... but, in order to get something migrated to another meta from Meta Stack Exchange, you'd have to:
- Recognize that the question pertains to another site and that it's worthy of migration (many may not be).
- Flag the post for moderator attention using a custom flag asking it to be migrated.
- Wait for one of the staff to check the flags and agree that it's high-quality enough and hasn't already been re-posted on MSO.
- They reopen the post (if it was closed in the interim) and migrate it.
Staff are a bit busy with other things. As you can see, 18 posts were migrated, but that's often because the staff member was already around when it was posted and is able to deal with it quickly. Often, I find that Jobs-related questions are migrated, like this one and this one, sometimes by Jobs team members who are able to migrate them to Meta Stack Overflow and then answer them.
The vast majority of questions I see closed as "pertains only to a specific site", though, are users coming to Meta Stack Exchange to complain about something on a specific site, not actually users looking for honest help. These aren't good candidates for migration.