I am not purely relying on AI/AI-S lenses but still approximately the half of my F- mount lenses are non CPU with AI/AI-S characteristics, then seven screwdriver AF lenses (with or without D characteristics but with aperture ring) which also have AI-S characteristics plus 4 AF-S lenses with aperture ring, so in total this makes the majority.These wont become obsoilete whether the remaining few are now discontinued or not - a significant share was aquired second hand anyway.
