Immm I think we would all be a pile of mush and die and also our bodies would shut down anyways
The reason as to why that is happening because as they grow older, their system gets weak and how they perceive things gets slow as their senses decline because of their age. This will enable to affect their sensory input, making older people receive less input compared to those who are younger to them.
Thats not a question but if you make it more specific and turn it into a question I will edit my response and answer your question!!