Mike Downing, co-president of Athene, said traditional retirement strategies may no longer be sufficient for the modern American retiree.

This shift matters because the foundational assumptions of retirement planning—such as the availability of pensions and the stability of Social Security—are changing. As people live longer, the risk of outliving their savings increases, making outdated withdrawal strategies a potential financial liability.

In an interview with Yahoo Finance, Downing said the evolving needs of retirees in the U.S. are changing. He said some estimates suggest a need for $1.46 million [1] to retire comfortably. This financial requirement is compounded by the fact that a modern retirement plan must now be designed to last at least 30 years [2].

Several factors are contributing to the instability of old models. Traditional pensions are disappearing from the workforce, and potential cuts to Social Security benefits could further reduce guaranteed income. These changes put more pressure on individual savings and the way that money is withdrawn over time.

Downing said the risks associated with the classic 4% rule [3] are significant. This guideline, which suggests retirees withdraw 4% of their portfolio in the first year and adjust for inflation thereafter, may no longer be safe for today's economic climate [3].

To mitigate these risks, Downing pointed toward the evolution of retirement vehicles, including the use of annuities to provide guaranteed income. He also said artificial intelligence is playing a role in modernizing how financial plans are managed and adjusted for longevity.

While some industry perspectives suggest the 401(k) still meets the needs of the modern workforce, Downing said the broader strategy must evolve to account for increased lifespans and the loss of employer-sponsored safety nets.

Traditional retirement planning may need to evolve because of longevity and disappearing pensions.

The convergence of longer life expectancies and the decline of defined-benefit pensions is shifting the burden of retirement risk from employers to individuals. If the 4% rule is indeed obsolete, retirees may need to either increase their initial savings targets or adopt more conservative, income-focused products like annuities to ensure they do not exhaust their funds before death.