[pyoung]

If you plan for a 20 year retirement, but live an extra 10-20 years and run out of money, that is a pretty significant downside.

Another advantage of retirement policies that can take advantage of actuarial risk, is that they can also adjust their market risk to match the actuarial distribution. The common advice is to have most of your 401k in bonds and other safe assets by the time you retire to protect against market volatility. But if you live another 40 years, you will have missed out on a lot of potential investment return if you were all in on bonds. Pooled retirement solutions can balance those risks better.