For me, the sign of the forum's demise will be the cancellation of award ceremonies like "For Contribution to the Heroes Community" and a complete shift of fundraising from the CIS region to other platforms, as this will clearly show that this forum no longer has any influence on the community leaders. And honestly, even if it dies, a huge chunk of the rather large history of the Heroes community will still be preserved here. Something like that.
P.S. I wonder if Kostya will organize a nomination for the 21st anniversary?