Phew, that took a long time. Almost done now though, just a small mastodon software update and we should be done!
The reasons why it took so long:
1. Our backup system for the assets is a bit on the slow side. An expected "couple of hours" after I shut the services down ended up finishing sometime in the middle of the night.
2. The system runs on a different network than where all our install infra is on, so I had to go in and patch the other port in to the right switch.
3. I've spent most of today with $dayjob, poking the server now and then when not so busy.
And that's it. If you see anything broken now, please give me a prod and I'll get on it!