I agree that the “living while you are young” idea also needs to include preparing for retirement. As both ER and UCGal mentioned, and as I have found, it is possible to do both.
Looking at some of the stats, I’m just guessing that around 50% of BB’s will be in a position to retire comfortably–and the upper 20%, very well. I think most of us here, regardless of age, have planned to be in that top 20%.
As far as selling off assets–specifically properties–in the future as needed. I think a lot of that success or failure will depend on where those assets are. If one selected wisely, and as global demand continues to increase in certain geographic areas, I don’t think that will pose a problem for those who hold assets in those areas.
Going forward, perhaps “retirement,” may be reserved for a far more select few–only time will tell.