I am one of the largest proponents on the forum that 2016 was a continuation of inevitable trends. 2018 confirmed that with high turn out.
However the thing is that not every election will have a counter wave that 2018 did. They may not be any counter wave at all this November.
It is hardly inevitable that Beshear will be destroyed in the districts he kept to a respectable loss in 2015 and it is hardly inevitable that Bevin will win.
The people who say, "A [party] will never in [state] again!" may be in for a surprise in a few years.