Why traditionalists live longer in age than Christains is an argument that has bothered minds however, christainity over time has tamed the curiosity of Christains with some bible citations, such as God takes the righteous early to avoid a sinful world. Then they make reference to Christ who lived 40 years. Apart from traditionalists living longer than Christains , other questions such as why none Christains are more successful in life than Christains with all the promises of riches, good life and prosperity.
The Christian Faith has its foundation in the New Testament but this doesn't make the Old Testament irrelevant. Jesus Christ never promised His followers a long life but He promoted living to fulfill our purpose in life. Dying old is not as important as dying righoues. I think Christians should pay more attention to living a fruitful and righteous life than living a long but sinful life. Even many of the disciples of Christ died young but they fulfilled their purpose. Some of them were even celebrating their death because they believed that they were going to a better place.
Jesus Christ didn't also say that you will become rich if you become a Christian. Many ignorant Christian claim that Jesus has given all Christians the power to get riches, that's a wrong perception of the Bible. Christ told use that we should be content with out daily provisions. Infact He actually advised us not to think of tomorrow because it will fix itself. Christ didn't emphasis earthly wealth because the focus of every Christian should be how to access the heavenly inheritance. The false preaching that every Christian will be rich is one of the reasons for the high rate of criminal activities in my country. Many religious people want to become wealthy through the hook or crook because they believe that it is their birthright.