Gah! You’re right. My IDE search was playing tricks on me. In fact there’s loads of examples “Permalink” objects being created. So maybe I’ll look at adding this to the FluxBB import.
I’m curious to know how your big import went @alldritt . Well it looks like macscripter.net is still on FluxBB, so not very well? 
If you noticed that the fluxbb importer is not converting bbcode very well, I’ve been working on various fixes to that: Pull request in progress.
There’s an interesting (awkward) overlap between these discussions, because FluxBB supports bbcode of the form [post=123] to link to another post by id (referencing old post ids in the source FluxBB system). It’ll make it easier to deal with that if we’ve got a solution redirecting these ids.