The question is: Why should Illwinter implement a feature that 1. goes against part of the basic premise of the game and 2. can be very closely reproduced by moving a few files now and then?
Yes, they do make some money off of Dominions, but that is not their main motivation for working on it. It is quite possible they might lose a few customers due to the hardcore approach to saving. I very much doubt it would be enough to make up for presumably compromising their vision of the game, and the hassle of implementing the feature. And who knows, maybe the unique style could actually increase the appeal to some players.
The real bottom line? I'd say there is about as much chance of an asteroid squishing the Illwinter team as of them implementing such a feature at this point.
