As an analyst in a large team, there has been occasions when multiple users are editing the same workflow resulting in duplicated efforts and overwritten work.
This is particularly an issue with remote working when it's not so easy or instant to ask your colleagues "Are you working on X?"
Having a notification pop-up (like the MS example below) would be extremely helpful in order to know if another user is already accessing the workflow so multiple users do not end up editing the same workflow independently.