The chiplets have cache, which holds copies of memory. If a process has the line open in an exclusive state, e.g. locked, other chiplets cannot just get the line from memory, because it might be out of date. So they must go ask whoever holds the lock to flush & release.
So there is no longer "near" and "far". In a sense, it's all "far" now (but hopefully not too far). But it is all uniform now.