Tailored suits have slightly less precise stitching than those that are made on a sewing machine.
This acts as another identifier of something bespoke and hand-made (beyond the personalised fit).
Today’s invention is a modified sewing machine which makes stitches in suits, or shirts -subject to a small, tuneable amount of ‘noise’ in terms of needle positioning.
This allows even-off-the peg clothing to appear somewhat more like a prestige product.