God is in control, He has mercy upon whom He will have mercy. My 96 year old mother accepted Christ seven months ago before she went home to be with the Lord. My 91 year old father also came to faith in Christ 5 months ago. It is never too late to accept Christ as long as people are alive. Sadly my mother’s sister died a week after she did and she had not come to faith in Christ.
This is why I witness the salvation of Jesus every chance I get, any age makes no difference. Old, young in between. The Great Commission is my commission.