Shaykh Khudheir hafidhahullāh said that the Qor-ān continues to be explained with new tafāsīr.
Every tafsīr contains specific information that is not found in the other.
The same counts for explaining the books of hadīth; take a look at the explanation of Sahīh al-Bukhārī with many shurūh, long ones and summarized ones.
Al-Shawkāni rahimahullāh answered when he was asked to give a sharh on Sahīh al-Bukhārī that there is no hijra (emigration) after the Fath (book title: Fath al-Bārī Sharh Sahīh al-Bukhārī). This does not mean that the need for another sharh besides Fath al-Bārī had stopped – no.
Fath al-Bārī does not stand out to ‘Umdat al-Qārī and ‘Umdat al-Qārī does not stand out to Irshād al-Sārī and they all do not stand out to Sharh ibn Rajab (al-Hanbalī) (in explaining Sahīh al-Bukhārī) – and like this.