に至って・に至り

に至って is used to indicate a turning point or culmination related to the preceding topic. It emphasizes that something has reached a notable extreme or final stage, often transitioning from a general situation to a more critical one. に至り is a more formal or literary variant of に至って, sharing the same sense but suitable for written reports, official announcements, or formal narration. A common extension is に至っては, which highlights an extreme example or exception within a larger context (e.g., “As for X, even …”). Typical contexts include discussing drastic changes, culmination of events, or the point at which a situation becomes noteworthy enough to warrant special attention.