As I dive more and more into this hobby I can see some huge differences in quality and game play between pinball machines over time. I'm not talking about which was best for the business (pinball was almost dead in 2000), but which decade saw the most difference between pinball machines in the beginning of the year vs the end. The 1970s saw the birth of Solid state, the 1980s went from Seawitch to Whirlwind, The 1980s went from Alpha-numeric to DMD to Pinball 2000. The 2000s went from... well, I personally don't see much difference. The 2010s went from Iron Man to Pirates.
Which decade do you think saw the biggest change in pinball machines?
EDIT:
Okay... with the caveat of "after the advent of flippers". Flippers were a game changer you guys are right.