Nothing stays “at this stage” for that long, or we’d still be throwing rocks and wielding jawbones. That’s my point. Large aircraft carriers will not be the weapons of the future either. Now drone ships, maybe. We have the technology to have things stay in the sky almost indefinitely. Not only that, but satellites will one day play an even bigger role than they do now. “Progress” keeps moving forward.
I highly recommend “Breaking the Phalanx” by Doug Macregor (as I recall). Interesting read for the forward-thinking military type who is thinking beyond the last war.