A mutating virus that becomes endemic is in no way a good thing. Endemic viruses lead to epidemics and pandemics. For example, we still have influenza epidemics from time to time.
But this is the natural order of these types of RNA respiratory viruses, as I've said from the beginning. Flatten the curve made sense, but the idea we would extinguish the virus has always been a fairy tale level of optimism. Having vaccines and therapeutics is great, and most people should choose them. But it's highly doubtful that the division caused by the political aspects injected will subside as fast as the virus will in between seasons. And this polarization and irrational fear of either the virus or the vaccine will continue as the new pandemic. The pandemic of hyper-political division, intolerance for opposing views and ultimately erosion of individual liberty. Hope I'm wrong of course.