I simply got tired of printing Ciba. Then, like you said, the prices skyrocketed at around the same time
the distribution started getting messed up.... and I figured its days were limited, so starting experimenting with color neg and RA4 paper, which was at that point far from satisfactory to me, but evolving, and has now arrived at a point where I feel is superior to Ciba. I also did plenty of black and
white work in the interim. I never found the masking work tedious, rather an enjoyable challenge, and
still employ analogous techniques to color neg work, though one does not routinely need to do this
as back in Ciba days, just as an ocassional tweak.