Never attribute to stupidity what is adequately explained by opportunity cost
I don't get the use of the terminology here.Opportunity cost is the cost associated by not reaping the benefits of an alternative not being picked. This is a cost from the perspective of the party making the choice.So in this story, 'opportunity cost' is not an explanation why something didn't happen. It is a side effect of something not happening.You could say the real opportunity cost in this story is the startup teams having a bunch of unhappy users. The explanation for the missing features is simply: they did something else.So better: "Never attribute to stupidity what is adequately explained by prioritisation"