If you want to enjoy the best 5 years of your career, you have to stay to 65.
Last 5 years are when you make the most money (unless you have been a draft pilot) and have the most seniority. The guys who were in their late 50's had a 5 year extension on the best part of their career. Younger junior guys had a 5 year extension on the worst part of their career.
You can tell what side of coin people are on by their excuses of how it was good for everybody. "Hey you got an extra 5 years too". Well I got an extra 5 years of being an FO, not a Sr. wide body Capt and that aint the same.