NASA must have a history of longer than expected lifespan. In December 1995, the Solar and Heliospheric Observatory satellite launched. It went live in May 1996, (the month and year one of my son’s was born) for a planned two-year solar study mission.
Last year, that same son joined their flight operations team as a college job. He actually said in the job interview “I was born for this job.”)
It’s almost 20 years past it’s scheduled life cycle.
The ‘life cycle’ is just a projection for budgetary planning purposes.
The real life parts and mechanics will usually outlive the planned life cycle..................