It doesn't take considerably more time. At this point, all the code I write is 2/3 compatible, and the things that annoy me are all py3 only features. Backward

It doesn't take considerably more time. At this point, all the code I write is 2/3 compatible, and the things that annoy me are all py3 only features. Backwards compatibility stuff is pretty easy. Most of the easy problems are easy, and six has solved all the hard ones for like 7 years. And I've been writing some of my code 2/3 compatible since 3.4.