Back in the days where it was a difference between a 300 ping and a 500 ping and the games were set up so it didn't cause massive problems, you had the world on a server. Many of my friends in games were from the UK or Australia, or elsewhere, and we played just fine across several MMOs over time.
Now, every country has its own server. Even more, you are regionalized -- you go on the server in your country that has 40 ping rather than 75 because the game system yields a significant advantage to doing so. Even if you were accepted with a 200 ping playing in another country, the game boxes aren't even compatible. You can't buy the game in the USA and choose to play in the UK for many games.
What this did was remove pretty much all of my social network for MMOs. I won't see the players I played with in new games because they are on their own server in their own country.
That you would find people playing from every country around the globe was a definite draw to these games. You got to chat in the background with people from a myriad of cultures.
Then there are times where you watch a let's player. They decide to make a guild and you get along well with the people on the channel etc, but lo and behold -- wrong country.
Everything is so localized these days.