We obviously got super distracted by a million things – many of which are very related to YBHP, like Javascript graphs! We actually planned for YBHP to be a prereq for Javascript graphs but then @saranli, in his amazingness, managed to port all the hideous lanes cruft, fully backward-compatibly, so now we have a single new codebase for all of that from which to proceed.
Oh and we did ship Generalized Mercy – Feature Announcement: General Mercy | Beeminder Blog – and forgot to update this thread [sheepish].
The remaining prereq is finishing death-to-autowidening-roads. All new roads have been sans autowidening for a quite a while and we’ve just been putting off some painful migrations for existing roads. (Upside is that the longer we wait the fewer there are to migrate and the less daunting that job is. 
) Plus other loose ends we’re not happy with in the new “razor roads” for weight loss.
Anyway, it’s embarrassing to be “so close” on this this long but it remains true and remains important!