I have been reading his columns since the seventies, first in Modern Photography, later in Popular Photography. I was glad he made it as a staffmember to the new magazine as this enabled me to continue reading him. I haven't cancelled my subscription on Popular yet, but I am not far from doing so now.
It would be nice to have his contributions bundled in a book. Would give a nice and realistic overview of the development of photography over the last half century.
No replacement available i fear.
Hans