Aren’t they planning to keep the B-52 for 75-80 years before they retire?
Planes can get re-skinned and have supports replaced. Not so easy on subs.
Yes, but with major upgrades and retro fitting.
True. But remember, it is a law of nature, that what goes up, must come down. The reverse is not a law of nature, what goes down, does not have to come up. That’s why aircrew carry parachutes, submariners do not.