We have a use case where we want to use the process tasks in a concurrent group as a checklist for the return of materials from terminated employees, as tracking what has gotten recovered has been a gap for us in the past. I built a service form that fits the bill for a checklist, but every completed task shoots another email out to the assigned group and the CC'ed users. Some of the tasks in the process do need to generate email notifications, but many of them don't and shouldn't.
When configuring a process task, I need a switch, enabled by default, called "Task Completion Email" that I can switch off so that my agents aren't bombarded with 30+ emails for a single request.