Not sure what you mean. Fallen in popularity? I agree, but that was inevitable once he stopped producing content.

I think aantonop played a crucial role as an early evangelist. He was real fucking good at it too. He went broke doing it and then was saved by anonymous donations. Then he stopped. Now he's a college professor in Greece. I hope he is living his best life and I'm very grateful for his contributions. Very happy to see Harding take up the mantle for Mastering Bitcoin 3rd edition.

I don't think of Antonopoulos as 'fallen' in any sense. He has certainly earned a retirement from public life.