It doesn’t matter which variants are out there because it’s only a matter of time before antibody levels decline again.the issue with that is there will likely another variants, just like flu, each season ppl get a shot. its never ending of mutation, transmission. ppl just have to live with the flu. at some point the virus may have lower fatality rate. its playing catch with constant mutation and dominated strain.
No matter how little or how much a variant escapes immunity, eventually it’s going to infect people again as past antibody levels drop.