I think the problem is that we may stumble onto more issues which are out of our control. Which makes supporting it hard. But if there are only small problems which we can workaround with small changes I don't see a reason not to merge them (for example the runtime IC issue - I would like to change that because while it currently works on ubuntu - it's ugly). I don't think dropbox is currently interested in a windows version of pyston, so windows specific support will have to be done by outside contributors. We are welcoming in getting it to work on other systems. :+1: (as long as it does not need huge changes which slow down development for our main target x68_64 ubuntu :-D) it's just that we can't currently spend much time on it.