I think part of that is competition and finding a niche. Scamp
, and Casita
plus a few newcomers like Nest have the 13'-17' range covered fairly well. As you go bigger there's fewer options. Oliver
, but they're sort of their own niche in terms of price and being rather long but narrow. Bigfoot does make as small as 17.5', but price-wise and weight
they're closer to Oliver
. So, "like Scamp/Casita but a bit bigger and nicer while not getting into Airstream territory on price".
It does kind of seem to go in cycles, though. I'd actually say if anything overall the small trailers have made a bit of a comeback the past few years. Nest, resurrected Trillium
, plus traditionally-constructed ones like the T@Bs.