The migration happened and well… it turns out that it was not as smooth as I expected. In particular, comments weren’t working at all due to a filesystem permission on the database (which meant nothing would get written at all). That is now fixed. Sorry for the problems.
To add problems over problems, I had a hardware failure (RAID card) last June, which wrecked the root filesystem and I had to reinstall everything from scratch. When I looked back to recover the last comment backup… Well… it wasn’t being backed up. I was able to recover the ones up to 2015-2016 or so because I had still my old Disqus export laying around.
tl;dr: Comments were broken, now they’re fixed, lost a bunch of comments due to hardware failure.
Excuse me while I go bury myself.