It's not gonna change. In maybe like 1 year from now, we will look back at the current Fsod-source and say "awr, I miss theese times". As long as Deca games, keeps updating the production-build, so will we keep updating, because everyone is so desperate to make a prod build server. However, if enough people start doing stuff on the old sources, those people could create a conor in the community focusing on making a 1:1 vanilla server from scratch. That's my suggestion/conclusion ^^
Ofc, what I mean by Old sources; would be working on sources that has the minor ammounts of current production build features. Such as the AS3 Barebone source by Kithio or the Creepylava(redis)server. Even the mmoe, if you are that badass :P