I don't exactly group them the way most would. I blend what Wikipedia calls Golden Age and New Wave together, where you had a ~40 year block of amazing authors

I don't exactly group them the way most would. I blend what Wikipedia calls Golden Age and New Wave together, where you had a ~40 year block of amazing authors cranking out most of today's top 100 list. Then, after that, you have this fade in of where cyberpunk themes start developing a new age of scifi. So, I consider "classic scifi" ending vaguely around the year 2000, and cyberpunk and modern scifi starting in the mid 80s, clearly these overlap. Also, I think we're transitioning into yet another new age of scifi that is post-cyberpunk; smaller in nature, less grandiose, less "living amongst the stars and living a space opera", less "living in a dystopia with extra steps", more "the AI winter will never end and we have to live with the promise never being delivered" and more "oops, we left someone behind on Mars and now he has to eat potatoes to survive". Whatever this new era will be called, it started roughly in the early 2000s, starting when the classic scifi era ended, overlapping with the middle of the cyberpunk era.