Here is another way to reduce the likelihood that machine sewn stitches with unravel: tiny stitches. On a sewing machine that doesn’t have a reverse stitch, like my Singer model 66 treadle, turning the knob to the left to make the stitches smaller for a few stitches, then back right to increase the stitch length for the rest of the seam, is a little extra insurance. It also helps work the sewing machine oil (SMO) into the threads of the knob. Bonus.

This actually takes about the same time as turning the fabric and making a “reverse” stitch, currently. The stitch regulator knob of the 107-year-old machine is still a little stiff.
Yes, I can sew a straight line. I just need more practice sewing a straight line while turning a regulator knob and controlling the balance wheel so it doesn’t go backwards and break the thread. Goals.