I do wonder if the range of opinions/experience reflects differences in static electricity in our various homes and regions?
We have no static electricity. No carpet in the house (hardwood only) and we live in the rainy Pacific northwest. I often have windows open while quilting, so the thing most likely to dislodge blocks from my design wall is a slight breeze so I like having the option to stick a pin into the insulation board.
I can well imagine that in a very different setting and climate, different materials would perform better.