I don't really care about the Repository bit, and can do without Quadrant, but the 'M' language for Schemas, Models and Instances was really cool.
I'd quite like to be able to create a meta-model for the stuff I'm trying to design and then read over it as an object graph and use it to generate schemas, plumbing and basic data entry forms. Or have a standard human-readable data storage format that I can then write import/export converters for into different formats.
I suppose I can make do with XML, the 'M' stuff seemed cleaner. With 'M' there was a standard way of expressing arbitrary graphs of a given structure, with XML it's only trees unless you use a lot of keyrefs.
It seems such a waste that years of work by all those talented people seems to have just evaporated. This always seems to be the case once a promising project is tied to another monolith like SQL or Windows.
I suppose there is always RDF and various tools built on that. Lots of research to do there.