2001- 3000

There are a variety of websites that offer a list of one hit wonders. One hit wonder central is one option and provides a list broken down into decades.

no
I think you mean extinct, and no they are not! They were on the endangered species list for about 3 decades, but they were taken off recently.

4.5 decades equals 4.5 decades!

List did leave prison but it was in a box. He died in March 2008. But with 5 murders and considering the fact the List evaded justice for 2 decades made it impossible that at his age he would have ever been up for parole.