Moreover, I'm thinking that modern information tools (Internet, polls, tracking, etc). have lead to better and more accurate forecasting, which in turn allowed the parties to apply ever narrower targeting at hyper-focused groups and minimize wasted effort past getting the majority needed to win elections. Basically as there is less and less noise the battles get closer and closer to the theoretical equilibrium point.

And this is bad because it causes huge shifts based on the whims of what, fractions of a percent of the population?