In 1976, when my father let me use my first “good” camera (his Voigtlander Vito B) he sent me to the store to buy film, with the instructions “Ask for Plus-X”. Decades later, here is an image from a test roll of Plus-X I shot yesterday — expired since about 1983, but still perfectly usable!

Olympus XA, 35mm Olympus lens
Plus-X, developed in Xtol 1+1 for 7.5 minutes