I think it's cyclical: there are periods of lots of funding available and less of funding available. There's still market economics at play. So the Lean Startup is not permanently dead simply because we see articles of startups getting $XX million funding or have $X billion valuations.
A company that is restricted on cash and "lean" is more inclined to be risk-averse and calculated in their business model decisions because they have to 'do more with less'. Whereas a company pumped full of cash has a greater 'trial and error' risk-tolerance because their goal is to overpower a target market to become the dominant player as quickly as possible. Investors still want to see a pleasing return either way.
A company that is restricted on cash and "lean" is more inclined to be risk-averse and calculated in their business model decisions because they have to 'do more with less'. Whereas a company pumped full of cash has a greater 'trial and error' risk-tolerance because their goal is to overpower a target market to become the dominant player as quickly as possible. Investors still want to see a pleasing return either way.