Has Anything Good Ever Come From Deregulation?

The right still thinks trickle down works. I don't see how they can think that after 35 years of it regardless of which party was in control
Has deregulation helped anyone other than the 1%?
Now republicans are poised to end the New Deal programs that created the middle class. It's been their goal since WW2. The end of SS and medicare, the end of public education, the end of public land and basically everything that made America the greatest country in the world. All of the rules that kept corporations from ruling the country and destroying the environment will be gone.
Can anybody name one good thing that came from deregulation?