For me, the biggest survival filter is when I price things out.
Almost invariably I find the product idea to be more expensive then I consider a reasonable price.
The next stage of death is the marketing. I've gone through about 25 marketing books, careful notes, annotations, etc, and honestly it's still the most common place of death. Money helps a lot here. So if you want that then go back to stage 1 and see if the price still works.
Then the things that pass that have logistics hurdles in the facilitation of the demand. There's delays, quality slippage, customer relations, it's not easy. You may get caught with a large stock and demand slips and you have to figure out storage, that's an additional cost on things that haven't even sold yet. Ackk.. The details are where the death is.
Innovation exists outside of all of this. Every now and then I hear about someone that went from innovation to product, experienced zero of these issues and just sailed in on easy street.
Those people are just lottery winners by another name. Screw them, that's not common reality. The world has randomness, it can be favorable, luck is something very real.
The hard knock strategies to modest success where you're not worrying yourself to sleep every night don't make sexy stories but it's the 99%. Expect nothing less.