The problem is that as phrased the question is a poll. If you check the What kind of questions should I not ask here? section of the FAQ you'll see the following:
avoid asking subjective questions where …
- every answer is equally valid: “What’s your favorite ______?”
- your answer is provided along with the question, and you expect more answers: “I use ______ for ______, what do you use?”
- there is no actual problem to be solved: “I’m curious if other people feel like I do.”
The question fails (as I see it) because the poster doesn't have a problem they're trying to solve, every answer is fundamentally equally valid ("Yes I still use flow charts", "No I don't use flow charts any more") and it answered the question in the question.
Also check out the blog post on Good Subjective, Bad Subjective linked to from the close reason. This goes into more details about the type of open ended question that makes a good question.
A more useful question might be something along the lines of
Are flowcharts still useful with modern software development techniques and methodologies.
Though I'm sure someone else could phrase that a lot better.