I always attended the Replay/FX back in 2015 - 2019 time frame. It was downtown Pittsburgh at David Lawrence convention center, and it was gargantuan in size. Replay/FX is gone, but there has been a Pittsburgh Gaming Expo for a few years. I attended yesterday for the first time. This is at the Monroeville PA convention center. Monroeville is like a Pittsburgh suburb city, 15 miles east.
PGX is smaller than ReplayFX was, but still comparable. I recognized many of the same vendors