i leave in hoop, except to reposition, until i am done. like popover, i left one wall hanging on scroll frame, which i use for minis and smaller wallhangings, for over ten years. the arthritis in my hands is bad, painful, stiff fingers. i like to have a "warm-up" project to work on for an hour or so to help fingers 'loosen' up and until the stitches are nice. then i start on project to be gifted, as all my quilts have been so far. one wall hanging of 31x26 took me about 13 yrs from cutting out blocks to last stitch in binding
..and no harm done from it being pinned to frame strips for all those years.