There are some things one just CAN’T let go.
For me it’s the triangle loom. I’m on a quest to discover how to get it to make a half square in the three-layer warping style. So far, no good. You can see how the bumps along the hypotenuse don’t intermesh. The corners don’t work either (believe me). If you lapped one hypotenuse over the other and stitched through two thicknesses, you’d have it, but that’s not what we’re after.