It's impossible to overstate how long these things have been in service. The oldest B-52 airframes still in active service were built longer ago than the first flight of the Wright brothers was when they were built.
He also said a big problem was the expense of doing a modern engine upgrade. Anyone know if they ever re-engined it? Was he joking again?
Having one of these fly over my apartment on Rock Rd. was a dish rattler--I used to see B-2s every once in a while too (fairly loud too, IIRC).
[PDF] https://crsreports.congress.gov/product/pdf/IN/IN11413
I guess he was right about the engines.