A friend of mine "retired" from the military at 38. She joined right out of high school. The Navy put her through med school, then she served as a ship doctor for over 10 years, traveling to dozens of countries. She "retired" with a military pension and an MD, having never spent a penny on med school. She works basically part-time now at a local healthcare provider.
Did that come across as jealous? Well, I am. We all told her she was stupid to join the military, and now we're all still paying off student debt, and she's livin' her best life. :(