Cute pictures! We totally had quilts with tied yarn when we were kids. I still have the patchwork one my mom made me when I was a baby. It is falling apart but I still love it. I think for my great grandma, grandma and my mom who made them that way, it was out of convenience and cost because the blankets weren't hobbies like quilting is for me. Those blankets were needed and there was only so much time to work on them with all of the other things that needed to be done around the house. And yarn-tying was quick, worked great and lasted a long time. Much faster than sewing all over a blanket by hand.