What makes the Boeing B-52 Stratofortress so long-lasting?

Two decades ago, working on the B-52 seemed like a brief assignment - not a career

Up to $11.9B for B-52H Maintenance & Modernization - Defense

After 60 Years, B-52s Still Dominate U.S. Fleet - The New York Times

Why don't they build new B-52 bombers and retire the old ones? - Quora

1.0] B-52 Evolution

B-52 Stratofortress

The Boeing B-52 Was the Greatest Fighting Airplane of Them All

Why did the B-29 Superfortress last in US military service for only a few years but the B-52 Stratofortress, designed only a few years later, last for so long? - Quora

Can the B-52 be nuclear powered? - Quora

The Last Engines the Mighty B-52 Stratofortress Is Ever Going to

The Boeing B-52 Was the Greatest Fighting Airplane of Them All

How many B-52 variants are there? - Quora

B-52H Stratofortress > Air Force > Fact Sheet Display

With new radar and engines in sight, the B-52 gets ready for

26 October 1962 This Day in Aviation