There is plenty of research to suggest that people go into cognitive decline after entering retirement. Whether that translated to a change in "happiness" is pe

There is plenty of research to suggest that people go into cognitive decline after entering retirement. Whether that translated to a change in "happiness" is perhaps a different metric, but it certainly is suggestive. https://www.apa.org/news/press/releases/2020/03/cognitive-decline-retirement https://www.apa.org/news/press/releases/2020/03/cognitive-de... https://www.sciencedaily.com/releases/2019/10/191029131506.htm https://www.sciencedaily.com/releases/2019/10/191029131506.h... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6153553/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6153553/