Thanks for your feedback! We’re reviewing your suggestion.Dave commented
MSFT please put a pin in your "Good Ideas" board to reinstate the ability to pin previously used folders. You see a pin is a way to remind you of an idea or thought you had before and allows you to return to that thought or idea quickly as opposed to having to recreate the thought or idea each time. Seems like you had it that way but maybe your pin fell out of the board.