I'm an old timer - have sewed lots of clothes. Took a class when I was 16 & learned that the length of the fabric along the selvage was much less stretchy than the width.
Started quilting 2 years ago & could never understand patterns that said to cut WOF. I always cut parallel to the selvage. Can't teach an old dog new tricks I guess!
And I never fold the fabric to get more with one cut. More time intensive but I think, much more accurate 1 cut at a time. Of course, I always was a slowpoke...........