My unprofessional opinion is that this will all slowly tapper off (2-3 years) and return to "baseline" if people stop taking the boosters (completely).

Otherwise we are still going to have "escape". And that means that possibly (maybe probably) we will all be affected.

Even if only 2-5% of people contribute to escape it could theoretically affect everyone.

It is the "escape" that will keep us (our immune systems) on the run.