Cost/benefit is where things get complicated. I would have loved to get HED Big Deals for my fatbike. 445 gram 85 mm wide rims? That is 220 grams (about half a pound) lighter than the DT Swiss BR710 rims I got. But the HED rims are about $1000 a piece and the DT s are about $150.

Would saving about a pound of rotational weight help me? Hell yeah. Is it worth an extra $1,700? Not for me right now. But if I could afford them, I may get them (or Kuroshiros which are a tad heavier but stiffer)