@pae1
I am no expert on this but from the reading I have done as I understand it when a user 01 creates the flow, that is controlled by them unless they share it with another user 02. If user 01 was to leave and had not shared the flow with user 02 then the flow would continue running. Or by the fact that Group Admin just goes and delets their account without knowing the flow is in place it might stop the business from running properly.
So would a service account be better, yes it would becasue you can get away from the above happening but depending on your organisations size then it could be quite difficult to control.
I have seen a lot of post in here and try to help but some I wonder what they are trying to do, does the Global Admin know whatthay are doing.
I am not sure if I have helped you, it would be good for some feedback. Other will pipe in if thay have any concerns @creativeopinion.
Regards,
Andrew