I think Nate did a phenomenal job calling out pollsters in that time. Since 538 was predominately a poll aggregator that did tricky stats to rank the reliability of each poll. I remember specifically an interview with him griping about some of the unusual data he was seeing from pollsters that made it look like, and I quote, 'Someone has their finger on the scales'
Outside of gridfinity it can be used to generate odd-sized grids via the GRIPS option, make HSW honeycomb walls, and supports multiboard, and a few others.