Why was the Holy Quran not arranged according to revelation?

The Companions did not arrange the Qur’an according to the order of its revelation. Rather, it descended all at once to the lowest heaven, then it descended in parts according to events. Jibreel would review the Qur’an with the Prophet, peace and blessings be upon him, every Ramadan and explain its arrangement to him. In the last year, he reviewed it with him twice. The Companions compiled the Qur’an in the same order that the Prophet, peace and blessings be upon him, heard it from Jibreel. This was based on direct instruction from the Prophet, peace and blessings be upon him, as he would specify for them the places of the surahs and verses.