Please decide and commit carefully.
Don't get me wrong, I don't want to bash on the efforts taken here. Creating any kind of communication channel and providing services to make it work is a really important thing and I'm glad you guys do that.
My point is: The means of communication used by the community are drifting apart and to my opinion, we lack a strong decision and commitment about what the official channels are.
Just recently I stumbled across this post here:
This basically proves my point: It names seven channels to communicate TYPO3 related topics. Only one of that seven is "mailing lists, forum and slack" (which I consider as the official ones till now) and the whole "social media" is a single point of those seven, which is a whole bunch of individual channels itself.
Instead of deciding for a technology to replace existing technologies as part of the infrastructure cleanup, my strong opinion about all this is to decide for a communications strategy in the first place that covers all current channels and brings them in a distinct order.
Distinct order means: We know about all of those channels, we name all of those channels and we encourage everyone to prefer a couple of them over others.
That can be done either by a "government decision", like asking all of but only the core team members.
Or it can be done by the whole community, asking on all currently available channels (emails, newsgroup, slack, twitter, stackoverflow) and giving it enough time to reach all of our community.
But making a technical decision, driven on infra structure changes and the manpower available for that, which was only discussed by a hand full of people is likely to be come just another option among several others when it comes to finding a place to drop an arbitrary question about TYPO3.
About integrating existing information
Whatever the platform will be, it should be a real successor of the current implementation, in all possible ways.
This include especially existing data.
Starting with a fresh installation and no content creates a feeling of something completely new that takes time to evolve.
We should avoid that feeling by filling it with all the existing threads and creating something that is mature right from the beginning.