> it is explicitly stated that number of works was a measure of productivity not quality.

I have noticed that. But my entire posting, to which you replied, had the subtext of excellence - in this case, the comparison of professional basketball and mathematics. And in the latter at least, quality and originality plays first fiddle. In this respect, I would be reluctant to shift the discussion to other qualities such as “productivity”. For me, this is not the relevant measure in this context and, as I said, I also view it critically as a criterion for whatever.

As for Tao, I knew the picture and the story. Yes, an old and a young one. So what? It's not countering my or Hardy's point. These are statements from experience about a whole profession.