The Graphisoft Community is definitely a better place to connect and learn, but other websites have their value as well.
There's a number of Archicad groups on LinkedIn, but not one called Archicad Users. That seems odd, as the largest groups for other BIM software are similarly named. So today I decided to fix that. Right now this group is small, but I hope to quickly grow it into the best place on that website to share Archicad knowledge, get support, find jobs, etc. So I know you're probably in some other Archicad groups on there, but come and join me there too. Here's a link to the Archicad Users LinkedIn group.
In my opinion, the group can be useful for sharing knowledge in a presentation way, maybe even for promotional purposes because you can also use video recordings, or as you mentioned, for job or employee search. But I'm agree with @Mats_Knutsson that for caring so much knowledge as there is here needs a forum structure.
I think there's value in multiple locations. There are discord servers, conversations on Twitter, a million Facebook groups, etc. The Linkedin group isn't intended to replace the Graphisoft Community, but an additional place for users to talk. Hopefully there'll be links from there to here to help raise people's awareness of the GS community. I'm sure many (most?) of the Archicad users on LinkedIn aren't aware of the community.
Either way, I completely agree, I hope GS continues to evolve this space and give it back many of the lost features from the old forum days.