I wouldn't totally write off HTML5 drag and drop, if you want to interact with other apps and enable drag between window it's the only game in town https://github.com/stevendwood/html5-dropzone

This guy seems to fundamentally misunderstand a lot of things about drag and drop.

He wrote that article 6 years ago, before a lot of the latest standards were even semi finalized. So when he wrote it he was 100% correct. Now however that article is a bit out of date.