When my mother in law passed (she was an amazing seamstress, made everyone's wedding gowns) I got all of her sewing supplies including boxes of those massive factory spools of thread. I was in hog heaven!! BUT, when I started using them, I realized because of their age, they were all rotted and breaking with every little tug. It broke my heart to have to throw them away. :(
Never skimp on your thread :thumbup: