Viruses follow similar patterns whether they are something serious like covid 19, or much less serious and not vaccinated for or not a very wide spread vaccination in the populace. More often than not, they settle into a non serious strain in both situations.Only 43% of those polled say they will get the booster which leaves quite a large pool of people for the virus to continue to both spread the virus and support its mutation into variants. It will be with us for a long, long time.
Yes, either way covid 19 will be with us for a long time regardless of the % of vaccinations. But it can move to a less serious strain sometimes regardless of the % of vaccinations. Right now it is proving that, in that the current variations are much less serious than those before, and will likely continue to be less serious. Yes the vaccination % could affect how long it takes covid to settle into a minor virus, but this is not always the case.
IMO, there is no reason to be excessively worried about covid at the moment. These opinions are not just based on what is in the news right now. Several articles I have read over the whole time since the pandemic are pointing me in this direction, as well as recent reports on the status of covid 19.