Imma throw this math out again, since I guess I have to all the time:
There was no discernible "classic" period, except what the fans considered. When SS.org relaunched in 2008, "classic" applied to all material before fall 1993 (Season 25); a 15 year difference.
Now, it's been nearly ten years since that. Does the "classic" mark stay where it was, or does it continue moving forward as the show does? Because now, the difference between "classic" (1993) and "current" (2017) is 24 years.
So, some may bristle at something from 2000 being considered "classic," but if something from 1993 was considered "classic" by 2008, shouldn't something from 2000 be considered classic by 2015, since there's the same time gap?
Yeah, stuff from the 70s and 80s will always be "Old School," but that doesn't mean something from 1996 or 2004 can't be considered the same as the show continues.