what-happened
GOLD
We are speaking past each other.It's closer to the latter. All immunity based on circulating antibody titers wanes over time. That is true for infection induced immunity or vaccination induced immunity. It's a natural balance our immune system strikes with seasonal infectious viruses. The viruses get their ecological niche. Our immune system gets updated with respect to new variants. Boosters are largely a public health effort to go from koyannisquatsi to balance while picking up as few new VOCs as possible. We will get there one way or another eventually. So if you don't want to play the booster game don't play.
We should feel lucky about the ability of the vaccines to prevent severe illness and death. This was true not just for healthy people but also for individuals in high risk groups with a wide range of C19 co-morbidities. My sister with Graves disease for example. The vaccines also demonstrably provide good long term cell mediated immune memory. Infection provides long term immune memory as well, with the one caveat being the durability of long term memory is proportional to the severity of infection. So C19 survivors walking around with lung tissue scarring should be in a pretty good place immunologically.
Plenty of vaccinated CV19 survivors walking around with lung damage. You miss my point completely. A reiteration of what vaccines do, their evolution, titers waning is useless when "science" was telling everyone how crazy effective they were. The CDC, the media, everyone, frothing at the mouth. Did they walk everything back..of course they did. Your description above, so some degree, should have been the initial business proposition.