Agreed. Since scaleless snakes are the super form I think the scaleless gene will hold value better than most codoms. It's similar to producing BELs, which have always been popular.
To answer the OP's question: I very much doubt that any morph will be bred out of existence due to pricing. It always comes down in the end. The scaleless project is a prime example. Those snakes are prohibitively expensive for me, but I've seen a whole lot more of them this year than I did last year, and at lower prices.
For the most part, it's breeders that will be buying high end investment animals in order to strengthen their own collections. I don't have a lot of experience, but I agree with those who do when they say you have to adapt to the market. What that means is that breeders have to broaden their own collections. Try out new genes, produce new combos, and stay on top of changes in the market and in morphology. If you breed the same snakes year after year you're not going to get anywhere. So it becomes a competition. Not just against other breeders, but against yourself.
I haven't even had my first clutch yet, but I'm in the process of breeding and I'm already planning what I'll pair next year and the year after that. I have long-term goals that include producing more and different combos, mainly visual recessive/codom combos, and some double recessives too. I'm sure I'll also add more genes to my collection as I go.
I'm excited about ball pythons and I want to stay on top of what's new and interesting, even the projects I can't possibly afford. Today's out of reach snake will be affordable eventually. It's only a matter of time.