Only 14% of Skyrim sales were on pc and not even all of them use mods

source:
http://www.gamefaqs.com/boards/615805-the-elder-scrolls-v-skyrim/64542105

which links to http://www.statisticbrain.com/skyrim-the-elder-scrolls-v-statistics/

Unfortunately, editor + this stretch goal promise a great compromise towards the community.
I like many of the Skyrim mods: travel to Elsweyr, bosses, weapon mods, voiced(!) companions... many people have been catered to by the community at remarkable quality. But for DM Mode... you will probably need to be able to customize the editor itself.