Just wanted to say thanks for sharing (again I guess). I have heard of d3 but not the observable project or jig. Not sure how I can use it exactly, but having it downloadable does give the user the confidence to put data In they would not feel comfortable online only. Like some other users have said going to be hard to take on excel / tableau but for programmers they can prototype something fast and cool. Look forward to trying them both out. Keep up the good work!