Ability to "Pause" a board

Our organization has roughly 100 projects running at any given time.
For one reason or another we have projects that need paused for a period of time. We do not want to delete the project or delete the due dates of the tasks as we have roughly 200 tasks all with preset dates that relate back to a key start date.

It would be ideal if there was a switch to flip to have the board be paused, keep the timeline dates that power our users’ My Work sections, without requiring them to manage selecting and unselecting project boards all the time.