Thats an explicit constraint, not an implicit constraint: The first person has an explicit constraint of "Lets consider only proposals that use existing technology". Thats exactly my point! Except in this case the implicit constraint was "must fit in memory for gaming applications", and I'm saying it should be made explicit. Its not that constraints are bad, just that they need to be shared along with the idea for it to be actionable.

Implicit constraints are the enemy of doing things better, as they allow people to claim basically whatever they want with hidden caveats, which makes it harder for the non-expert to figure out what they need to actually get things done.