Quote Originally Posted by VertexGeneral View Post
...they can also create 2 separate patch times for them.
Even if companies don't care or they split EU/NA servers, it is not ideal to run multiple maintenance schedule. This is a matter of practicality from a technical side, and not necessarily about concerns on finances/time spent. I believe it is easy for them to arrange since it is a matter of delegation (like EU/NA team, handle maintenance at your preferred time. Japan team, same thing.) One time big time maintenance for all timezone ensures compatibility across all regions. Internal feedback or possible issues that arises during a maintenance can be aligned and directly handled for all regions. Just because there is a problem with NA/EU doesn't mean similar problems can't happen in Japan setup.

On a personal note, the mere fact maintenance is overseen by Japanese team (though I am only assuming this), I find it assuring because they're known for being meticulous.