Closest thing I could find was a report [0] on a 2007 panel discussion with Brooks at OOPSLA, titled “No Silver Bullet” Reloaded – A Retrospective on “Essence and Accidents of Software Engineering"

Here's [1] a link to his 1995 update, an excerpt from an anniversary edition of 'The Mythical Man Month'

[0] https://dl.acm.org/doi/pdf/10.1145/1297846.1297973

[1] http://worrydream.com/refs/Brooks-NoSilverBullet.pdf