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

B-52, Development, Specifications, & Combat History

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

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

Air Force prolongs the life of the venerable B-52

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

Stratofortress: The Boeing B-52 Was the Greatest Fighting Airplane?

Can a B-52 land sideways? - Quora

Why Is The Boeing B-52 Stratofortress Expected To Have Such A Long

Boeing B-52 Stratofortress High-Altitude, Long-Range Strategic

Why is the B-52 called Stratofortress? - Quora

The new B-52: How the Air Force is prepping to fly century-old bombers

Will the B-52 Ever Become Obsolete? - NI

Boeing B-52 Stratofortress High-Altitude, Long-Range Strategic