When black and white conversion is necessary

I loved Agfachrome 50 slide film, it had what I considered a more European look. It wasn't as flashy as Kodachrome II, the all time great slide film but it had its positives in rendering some colors a bit warmer than the Kodak film that always tended to give a cooler or more on the blue side look. Did i mention that it was also much cheaper? Well, unfortunately, unlike it's Kodak counterpart, it did not age well and the colors faded and became quite magenta looking. The only thing to do in this case is to use black and white conversion in Photoshop. It works quitw wellas these  old slides show. All taken in Florence a long time ago.