In reply to Miroslav Glavic.

As a person from a third world country I can tell you one thing. If a person cannot afford to update from Windows XP then there are not going to afford internet. At least they cannot afford internet on their laptop/desktop.

In third world countries like mine (Zimbabwe) mobile browser usage outstripped desktops eons ago. Right now for example 95% of users on one of my sites, which is very popular here, uses one type of mobile browser or another. Of the remaining 5% more than 80% use Chrome.

So no third world countries, in my humble opinion, will not be affected much by dropping support for outdated software.