expression
has reached its limit; has peaked
Fixed classical-sounding expression meaning something has reached the utmost degree or climax. Often follows a noun (e.g., 贅沢ここに極まれり). Used in formal or literary contexts to emphasize that a state or quality is at its extreme.
このホテルのサービスは、贅沢ここに極まれりといった感じだ。
The service at this hotel feels like luxury has reached its peak.
彼の無責任さは、ここに極まれりだ。
His irresponsibility has truly reached its limit.