I guess one should never say never, but I doubt it - so long as we are talking about cities.
In order to facilitate this we would have to release quite a few of our internal tools and converters (and write a few new ones) and there is nothing quite as flaky as an inhouse development tool
In the end it comes down to a guess if it is worth the effort to update all those tools to a state where a user's mental health won't be at risk.
But I am well aware that the community wants to mod games and I find that very cool thing that should be supported in one form or another.