What is the release cycle for the features in the pyroot_experimental flag? Do they get added to default ROOT in the next release?
New features added to experimental PyROOT are in general not added to the current PyROOT, unless it is something critical. Experimental PyROOT is intended to eventually replace the current PyROOT.
Also, our current target is for PyROOT experimental to be mature enough by the end of the year to make the switch possible. If you are already using it, please let us know about any missing feature / issue you observe!