Can't speak for OP, but I don't look at the 401k as a stable retirement vehicle. It's a vehicle to pump "dumb money" (read: casino chips) into the stock market. If the stock market downturns just before you retire, if the firm managing your 401k makes bad investments, if another 2008-style real estate collapse happens, your retirement fund suddenly has less money in it than you hoped, so you're gonna have to work longer.