As the combos get more complex there may be a niche for breeders who understand genetics.
Already platy looks to be in interesting one to reproduce. It doesn't look like platy X platy will give you 100% chance platy. According to the not completely proven (but consistent with everything posted so far) theory that the hidden diluting gene that turns a lesser into a platy is an allele of platy, the platy X platy breeding should produce eggs that each have a 25% chance of being a homozygous lesser lucy, a 50% chance of being a platy, and a 25% chance of being a normal looking homozygous hidden diluting mutation. It's actually those normal looking animals that might be the most valuable because crossed with the homozygous lesser lucy they are the only way to produce 100% chance platy.
You also can't produce cutches of eggs 100% chance spiders without a homozygous spider which has not been publicly proven to be viable yet.
Surely the purchasers of a high number of morph combo animal would be told what the animal was. I suppose another discussion could be held about the most unnoticeable morph once you get to those multiple morph animals. Could the breeder even be sure of everything that's in such a cross? Say, once an animals already pastel and fire could you also tell if it was vanilla just by looking at it? If you could, how about telling if it was super pastel or vanilla?
And at some point even those multiple combos would be potential pet store animals rather than going to breeders. At that point the purchaser might not care about reproducing the morph, only that it’s pretty. I used to breed calico hamsters and knowing how to produce 100% calico females was important to me but not to the people who purchased them from the pet stores I sold to. The information on how to do it is widely available but not sure if most hamster breeders bother to learn it or not.
Maybe there will eventually be breeders who specialize in producing animals for other breeders who specialize in producing animals for pet stores. For example, breeder A might produce the specialized stock like homozygous lucys and homozygous hidden diluting gene animals to be paired up and sold to breeder B who wants to produce 100% platy clutches. But then again maybe there is more fun in variable and not fully predicted clutches. Having a large variety of hatchling types in one clutch to match a variety of tastes might be best.