I am interacting on the community forum of the decentralization effort called Solid and in a MeWe-related discussion they mention that OpenBook is also considering using Solid to decentralize their social network in the future, which would be a very cool addition to their ‘humane tech characteristics’ checklist 
From their FAQ:
Will Openbook be decentralised?
We want to get there eventually. We’re looking into Solid MIT approach (The one from Tim Berners Lee) and we’re very pleased with it so far.