Hi Maciej,
In my opinion, it would be better to save all of informations about fork and join, whatever which branches are chosen to contien or which branches reached it or complete join to continue.
Because we want to use history records to display the route of the proces instance as video or annimation or something just like these. Now we have to guest when the fork or join reached. It is really hard to guest these information without history records.
I think it is maybe a little hard to achieve these features on current PVM. Just after we support dynamic fork with foreach and M of N fork, and join with multiplicity attribute. What are you thinking about it?
Regards.