I'm sure it would still be with us as this virus will be part of our lives forever, like the other "corona" viruses we have. Just one more endemic infectious disease. With that said, the thing will eventually be like all the other diseases that have become endemic to our species and make it's rounds every season making lives miserable and ending a few along the way. Not the first, won't be the last.

"Breakthrough cases" are about as much BS as inflation is only transitory.  If the vaccines were as effective as the mandates would make them appear, and the "faucites" claim, then the breakthrough cases would be a few 100 based on the number of fully vaccinated so far in the U.S., not 10's of thousands as we have now.  It also appears that the vaccinated who have a breakthrough case, have a higher chance of being hospitalized and death than those who are unvaccinated.  Last year, about 4 out of 100 infected people ended up being hospitalized, and out of those 25% died, for the breakthrough cases, about 7 out of 100 are hospitalized and 33% have died.