I’m trying to find a phrase to describe an important phenomenon: When we fix a problem, we forget it. Pop culture forgets, and the mass media forgets, and young people never learn about the problem or how it was solved. Can you help suggest a name for this phenomenon? Read more here:

Some of the examples are: We fixed acid rain! (And now nobody talks about acid rain.) We are fixing the ozone hole. Bald eagles are everywhere now. Y2K didn't destroy digital infrastructure. We (mostly) saved the whales!

We fixed hereditary aristocracy in the US ~300 years ago