The dominant trend in retirement is the 401(k) plan (if any plan at all). The assumption is that the employee (i.e. you and me) assumes the investing risk and responsibility. We are in control of out destiny. This is only partially true. Yes, we have the risk, but we have little control. Why?

Your investment choices are picked for you by the employer; there is no free flow of your capital to whatever you think would be the best investment. Being able to only choose between six to 12 sucky funds is not a choice!
The market moves fast; you can't. I know that in my case, I can "change" my fund mix anytime I want...oh wait...my changes are only processed after the close of the business day. So, let's say there is a crisis that causes the market to drop at 10:00 am. If I was outside of the 401(k), I could sell as soon as I heard the news and at least retain some of my assets. But sorry, you are only allowed to sell after the big players saved their you-know-whats.
Too much information, not enough knowledge. Ever read a prospectus for a fund? It's like a marriage between a Supreme Court decision and a software End User License Agreement (the thing you quickly agree to so that you can download your latest browser) with a 10-year return chart thrown in. (Funny, they didn't include how the fund management fees changed over that period...). Yes, you can read it, but sanity is fleeting.

Oh, well, working into your seventies is a plan too...