Comment 2 for bug 1892887

I think that it would make sense to exit 0 if all the subtasks exited 0, and pick one of the failure codes in some consistent way when one or more actions in a batch failed.

I think the use case here is "automatically proceed with this thing I want to do if everything is okay; otherwise, stop, and tell me what broke so that I can intervene." In that use case, I think that we're okay proceeding if everything worked, and exiting with a non zero int if it didn't.