With a new coach is window still open for core group?

[*ochocincos*]

I think that if the window is shut and this team goes into a true rebuilding mode, you're going to see a LOT of fans leave.
Yes, a lot of fans lived through the "dark decade" of the 90's, but good luck telling them they could be going back into it again.
The fans had a taste of consistent success (albeit not a ton of success), so that's the new norm people are willing to accept.
We're already seeing the stadium half-full with a 5-win team. Regressing even further will wipe out many people's interest even more.