turning the mattress foundation into a wall divider to separate my home office from the rest of my living room
What Should I Do With This Mattress Foundation?
Nicole Dieker

Would this actually work? Because that would be an amazing way to get some use out of it until/unless you ever need it to resume its prior role again.

(Or you can get rid of it, but I share your aversion to disposing of potentially useful items — especially if it’s something I can’t just chuck into a trash can and forget about immediately.)