Well, for arguments sake...if for no other reason! LOL I have to tell about something I did about 25 years ago.... my sister and brother in law asked me to make them a "quilt"...well, I wasn't quite into pieceing alot yet then so I took two double flat sheets...put a batting in between them...and I tied them (not quilted) and zigzagged the edges shut.... they are STILL using that "blanket" today! Sheets last forever...I have been married 31 years and still have some of the sheets I received as gifts and they are in good condition yet!
And, as I said in an earlier post....I dont hand quilt when I use sheets as backing and was also told by someone with a longarm that they don't line up well on the long arm machines...but for my regular machine quilting and tying I can't afford to go spend 3 or 4 times as much on material...when you can put a backing on a twin quilt for $3.00 then hey...go for it! LOL