Well, there are so many places that you can communicate and get involved these days (Fall 2018) that there's no shortage of places to go and get help, share suggestions and be involved. Although the Forum structure/concept is an old one, for older folks that are used to a certain structure, the model still works well and gives the type of question/answer/search help that is needed.
OH, and "dated stuff" is sorely needed when you are supporting sites that range from DNN 5 through DNN 9... just because it's dated doesn't mean that someone doesn't desperately need the older forum post! Myself, I've found useful a post I made 4 years back where I helped answer someone's question... I helped myself 4 years later when I'd forgotten the details of the answer!
I'd say that, before throwing out the Forum model, I'd recommend jumping in with both feet and becoming the change that you wish to see... respond to posts, ask questions and see where you can pitch in.
But the original point was that there are many places now to participate and get questions answered and concerns posted. Here are a few:
1. User Groups
The User Groups are a great starting point... if you're feeling isolated and aren't hearing people talk heavily about DNN, then you just need to stop by a User Group to get energized and directed to the right locations
Southern Fried DNN User Group
http://www.SouthernFriedDNN.com
Toronto Area DNN User Group
https://www.meetup.com/Toronto-Area-D...
2. DNN Open Friday
Another initiative from TADUG's Aderson Oliveira is the Slack Workgroup, "DNN Open Friday" where DNN MVPs, developers, clients and users mix to ask questions and get immediate answers and suggestions. Way more immediate and satisfying than a forum, the Slack work group helps get things done!
https://www.youtube.com/watch?v=uUZBc...
3. Github Participation
As the community continues to drive and become more involved within platform update and new release activities, the github locaiton is increasingly becoming a place to post bug issues, new feature suggestions for discussion and to, in general, watch things get done in DNN updates. Once you're sure you have a bug or solid feature request, this is the place to post.
https://github.com/dnnsoftware/Dnn.Pl...
4. DNN Connect Facebook Group
Finally, and not least, is the DNN Connect Facebook group... you started out asking about whether there was a Facebook group that helped perform the actions and activity/participation that you were missing from within the DNN site forums. This is the locaiton you're looking for. There is heavy activity and a wide range of developers, users, MVP and more who participate here on the regular.
https://www.facebook.com/groups/dnnco...
There are plenty more places to participate in the type of share, help and information actions that you're looking for. I hope to see you at an upcoming SoFri !