I think about 4x for greenfield development. For example, I implemented this motion controlled game from scratch in 5 days: https://motionparty.net https://moti

I think about 4x for greenfield development. For example, I implemented this motion controlled game from scratch in 5 days: https://motionparty.net https://motionparty.net For this kind of no expectations, for fun development I find AI makes it much easier to develop and test hypotheses. For other styles it's different, especially if the stakes are higher.