Uruguay are the only side to have played a friendly at their principal base, the Centenario Stadium in Montevideo.
Brazil played three games in the provinces, Paraguay played once in Cuidad del Este, and Ecuador's only full international was in Guayaquil, and not the capital Quito.
Four years ago all of the teams going to the World Cup made a point of playing at least one game in their major city.
Why the change?
One obvious reason is that football's calendar has become so crowded that the dates available for friendlies have been reduced.
Fifa stipulated just three dates where clubs were obliged to release their players for international duty.
Even if they wanted, Argentina would be unable to stage six friendlies this year.
Then there is the fact that so many of the players are now based in Europe.
From an organisational point of view it is easier to stage the games on the other side of the Atlantic.
Paraguay, for example, have played more games in England than in Paraguay.
And for the first time ever Ecuador have played full internationals in Europe.
Finally, and most worryingly, there are the political and economic factors.