Gravel / Gravé / Gnarmac / Groad / ATB

Never gets old...

My question from a few days ago still stands:

Anyway on the chubby wheel chat from some pages back, how come more people aren't using all those dirt cheap fatbikes floating around ebay?

Is it wheel weight? If so could you use carbon rims and slightly smaller wheels tyres and narrower rims?

wow no wonder @BareNecessities wasnt posting much last year, he was clearly designing this bike for Surly