You're right. Didn't check the dates, just relied on my conviction that I would have noticed him before.
In fact, there are threads on him going back six plus years, but no mention since 2017 (two other earlier threads linked in this 2017 thread):
https://www.companyofmen.org/topic/93555-411-on-amsterdam-nyc/#comment-1130271
Note the only RMasseur review also dates from 2017.