I have long thought the binary retirement system we have primarily used is less than ideal. It would be better to transition from full time work to part time work to retirement as people move into retirement. According to this study, from the University of Michigan Retirement Research Center, the phased retirement option is becoming more common.
The paper doesn’t really focus much on what I would find interesting about the details of how we are (or mainly, how we are not) adjusting to make partial retirement fit better in our organization (the paper is focused on a different topic). The paper does provide some interesting details about the changes with retirement currently.