There is a clear selection bias here, which is revealed in the first response (unless that was what you're pointing people towards). IDEs are a lot more common on Windows, which has the best adoption rate. The data from the two sources in that comment point towards a large majority of users still using 2.7, which agrees with my experience (which is in the scientific community). The number one reason being that there is no incentive. There is a lot of that attitude is common, "if it isn't broken, don't fix it". At this point we need to recognize that python2.7 isn't going to die anytime soon, unless there is a drastic change.