As an example I’ll use the inferno cabin. You could make a facehugging snowfall build with a Dusk, but Inferno does it better. You could make a Manitou revolver build, but Inferno does it better. And so on.
There are some cabs that really need to be reworked and we complain about them all the time, so I am making yet another complain thread about the same stuff. I don’t think there is a single “Weapon specific cab” that can compete with the more better cabs that offer a way better damage boost, on top of it being universal for many weapon types. Maybe Steppe Spider, but That thing got buffed and buffed and then buffed even more, it’s got a perk so good and multi-use it should be rebranded a legendary by now, being the only missile cabin in the game for the most part.
So why are the other cabs left to rot so much? Manitou and Dusk are the most obvious examples, but so many cabs have become extremely outdated and there is no reason to use them over the way better options, that also seem to not be completely abandoned and forgotten. Like the inferno for a simple example, nobody was using it, so they buffed it, and now everyone uses it over any weapon specific cabs specifically designed to be used to make certain weapons good (on paper but not in practice)