I remember having discussions with other IBMers on whether or not we would ever see memory (core) get as low as a dollar a byte!!!! 256K of core was a monster machine when I started, in '79.
My territory included the only VS1 account in Ft. Worth, Texas Power and Light Company. They didn't convert to MVS until 1986.
Our 360/65 had 64K of core go bad. It was about a cubic foot in size and took a week to replace...