But Ruby Core is not the same thing as Ruby Central, apparently? This blog post says, "To provide the community with long-term stability and continuity, the Ruby core team, led by Matz, has decided to assume stewardship of these projects from Ruby Central. We will continue their development in close collaboration with Ruby Central and the broader community." What, if anything, is the relationshp between Ruby Core and gem.coop?
There is none. gem.coop is run by people who were previously involved with RubyGems and Bundler before they were ousted or resigned; AFAIK none of those people are part of Ruby Core.