Its very opinionated, I don't know the percentage of people doing it, perhaps a large poll would work. I think that its close to 50/50 for people who like the game stock and people who enjoy using mods, so this might tie in with that.
It will pull from the stock purist people like me who know that the paint isn't necessary for the craft to work, but it will also pertain to the people who heavily rely on mods, because it changes up the game in a way that they enjoy.
There are my two long run-on sentences for the day.