"It doesn't do as good a job as it used to, but we never had a vaccine that was 100% effective at doing either of those things."

Oh please. We have a truckload of vaccines that convey multi-decade/life-long immunity. case: the smallpox vaccine, polio vaccine, etc

We truly never had a real Covid Vaccine - we only have "protective boosters" and for Omicron they are utterly in-effective.