2019 Inductees to Rock and Roll Hall of Fame

Inductees: Janet Jackson, Def Leppard, Stevie Nicks, Radiohead, the Cure, Roxy Music and the Zombies.

Eligibility:

Artists—a group encompassing performers, composers and/or musicians—become eligible for induction 25 years after the release of their first commercial recording. Besides demonstrating unquestionable musical excellence and talent, inductees will have had a significant impact on the development, evolution and preservation of rock & roll.

There’s one quantitative datapoint (25 years) plus several qualitative requirements.