Time to retire 732 maybe?

As Kabir said, there are many 732s flying the world over, but they are an older type and maybe it’s time to replace them with newer technology 737s. It’s always tragic when an aircraft crashes and there are fatalities, but would we hear less of this happening if there was a rigid “retirement” limit on all aircraft which are so many years old or have exceeded a set number of flying hours. The airframe cannot last forever, and such tragedies need to be prevented as best we can.