The most likely outcome is retiring early, but that really only applies to young people making significantly better than average salaries in order to do it quic

The most likely outcome is retiring early, but that really only applies to young people making significantly better than average salaries in order to do it quick, before having kids. If you have spent 40+ years saving every penny, you don't start spending when you retire, saving money has become part of your identity, not a mean to an end.