Bump to this thread. I really do not like mutation history being stored. I have a stupid LabVIEW bug where the IDE thinks I am using a class which I am not (really am not). I thought perhaps it was being referenced from the class mutation history. So I poked around in the history of some of my classes and am horrified at the history that exists! I don't know about others, but my standard framework has been adapted over time (several years for my current actor based framework). I still have