The World Access System, recently implemented in Final Fantasy XIV, allows players to go to servers in the same data center, but Square Enix's team set its goal on a larger target.
Currently, players from servers in different data centers cannot play together.
While physical data centers still exist, teams are looking for ways to break down barriers between data centers so that we can play with everyone else, regardless of the server and FFXIV Gil data center. Having said that, this is a very challenging task.
Developers are discussing how to do this internally from an engineering perspective. Unfortunately, it can not only happen magically, but it is still working hard.
Although there is no guarantee that it will work, they have some ideas on how to implement this "magic". According to Yoshida-san, they began to see the lights at the end of the tunnel, and he encouraged fans to wait for further information about the matter.
The first step the development team plans to take is to break the boundaries FF14 Gil between logical data centers. However, these boundaries are very reliable, so they need some "magic" to achieve it.
The ultimate goal is to eliminate the boundaries between physical data centers (for example between North America and Europe), but this requires "extremely powerful things like Hydaelyn Kick" to complete.