Have you considered an operator that stores the current state of everything (macros, processes) into an object that can be marshalled and used as a different starting point? Like... the Store operator but that stores everything, not just the things we order it to store.
e.g., I build a process that does A, B, C, D, E and F things. I know B and D are expensive in terms of time, so I can put a savepoint for B in case I need to fix something in C, D and E later on but I don't want to go through the pain of executing B and D *again*. Therefore instead of the Play button, I can get a list of savepoints and play from there.
Now, I know I could store things but savepoints could help me building something small, just exploratory, before even organizing my project directory, in a more efficient way.
Is there such a thing in plans?
All the best,