I haven't seen a clear solution yet on next-gen projects using the board, to display the sum of the story estimate points.
There are some Chrome add-ons to do that, but none of them are working on next-gen at the moment.
I think there is probably a way to do that if I activate the sprint feature, but we are in a scrumban setup and I don't really want to mess with classical sprints.
Also another side question (I should probably ask in another thread) : I can add a "max" rule on a column, but no "min" rule. I had to put it in the title of the column, but that's not gonna trigger any alert. In scrumban the Kanban Planning is triggered when you reach a "min" value for a WIP, so that would be very helpful ;)