WE are not simply depending on opinions. Historical facts confirm that John wrote Revelation around 95/96 AD. Here are excellent reasons:~ Just because someone wrote the words 'But the more commonly received opinion is' does not mean that it was actually true at the time it was written?
"Will the internal evidence help?
The advocates of the later date rely much upon the degenerate state of the Asiatic churches, as described in the Epistles to the Seven Churches. The Epistles to the Ephesians, Colossians, and Philemon were written during the captivity of St. Paul at Rome, about the year A.D. 63. If, then, the Apocalypse was written in A.D. 69 or 70, we have only an interval of six or seven years to account for a striking change in the spiritual condition of the Asiatic churches. Can we believe that a Church which is so forward in love as that of Ephesus (Ephesians 3:18) can have in so short a time left its first love? Can it be believed that the Laodicean Church—whoso spiritual condition in A.D. 63 can be inferred from that of Colossæ (Colossians 1:3-4)—can have, in six brief years, forsaken their “faith in Christ Jesus, and their love to all the saints,” and become the “lukewarm” church (Revelation 3:15-16) of the Apocalypse?"
Ellicott's Commentary.