Events happen! I am time poor, and I refuse to get stressed about quilting so, when the pressure is on in other areas of my life, sewing projects get stalled. That's ok with me actually. I enjoy the process.
I do have one small UFO that is stalled because I didn't prepare it correctly (scaled it down, and made mistakes). As more problems emerge, I learn from them. It will never be right- the blocks will be misaligned and the seam allowance will be too scant in some sections. It may grow up to be a wallhanging. Or it may continue to absorb scraps as they become available! Apart from the thread, it is not costing me anything. I don't charge quilting for my time- it pays me, with calmness and contentment!