Most of the lean startup methodology is all about 'determining requirements'. The leanness is about not bothering to spend too much time creating things without determining requirements. Sometimes, the requirements are your own and the requirement in question is creating things (like art) and so you can't possibly spend too much time on whatever it was you you were creating. Sometimes requirements need a very long study in order to determine them. Nobody is arguing against long study exercises, especially for wicked problems. Sometimes 'long termness' turns out to be big problems that are made up of lots of little requirements. You need long-not-lean studies and while they are being done, you may also want to try quickly evaluating shorter term hypotheses. So yes, we can talk about where the lean startup fits in to long-termness and wicked problems and yes, claiming that lean startup is over is a great stimulus for debate, so thanks, OP.