FYI, it is by the same people who initiated the Modelica effort (Hilding Elmqvist and Martin Otter). I think part of the goal was to shed having to maintain a whole language (and the need to specify all the semantics details of such) and simply leverage a language that had macros.

I haven't really heard many updates on this in some time. I don't think it is necessarily a bad idea. But any effort along these lines takes a lot of dedicated people quite a while to make progress (as was the case with Modelica).