> Not that I hold out too much hope here, but given GitLab's emphasis on the enterprise and self-hosting, it would be amazing if they could put some effort into making disparate GitLab installations behave like one big network (think Six Apart with trackbacks/typekey/etc way back in the day).

Yeah, I think it'd be awesome if there was some form of optional federation between GitLab instances (sort of like Matrix or NextCloud).