This is a very constructive way to look at it. But the step between 3 and 4 is huge and often does not "happen." Lots of nifty but ultimately fringey ideas ar

This is a very constructive way to look at it. But the step between 3 and 4 is huge and often does not "happen." Lots of nifty but ultimately fringey ideas are adopted by small group, refined and never become widely adopted.