Just a question here: IMHO, adding another registry maintained by someone means that I need to trust him/her quite a bit as it appears to be easy to register a higher version of any package available from General in that registry and thus hijack it. Or can this be prevented by Pkg by just avoiding to install a doubly registered package ?
EDIT: Also, using another registry IMHO doesn’t solve the namespace problem. The only possibility I see in the moment is to use good old hungarian notation - all packages in registry CoolPackageRegistry would would have names like prefixed by a slug of the registry name, eg. coolCore.jl etc.