Comment by MitjaBezensek

D3 is a joy to use and one of the reasons we've been able to iterate on our product so fast. Once you get over the initial learning curve you can build things really fast and the actual charting part ends up being the easiest to do in the whole process. Processing data, handing interactions end up taking most of your time (I'm speaking this as a developer working on a visualization product https://zebrabi.com/pbi/).