Well, they sorted it out! The Visual Studio 2015 installer is now componentised:
It is now very straightforward to understand, especially for upgrades. This is true also for the third party components like the Android development stuff.
How was that possible, given the monolithic ISO that Visual Studio was? Let’s have a look at the packages:
And then there is a file for the external, downloadable components. It is the feed.xml file, this is an extract:
Kudos to the team!