We clearly do not have a choice about endemicity. It will be endemic given that it very clearly evolves antigenically to achieve escape from waning neutralizing antibodies and it has animal reservoirs all over the place, including white tailed deer. It was pretty easy to see eradication was off the table in summer of 2020. At this point is kind of fucking stupid to talk about it. Even if you could snap your fingers and make it go away in humans it would just spill back from animal reservoirs. You'd have to eradicate all the deer, mink and every species you don't know about that has been infected with it. At this point it isn't humanly possible.
We won't be taking precautions forever though. Reinfection and vaccine breaktrhoughs will be mild. T-cells and B-cells don't wane the same way Nabs does and protection against severe disease and hospitalization will be durable.
There will be loss of protection as you age, but we already have that with all the ILI illnesses and viruses that lead to pneumonia and death in old people.
There won't be some worse virus that somehow punches through T-cells, that's getting into the realm of science fiction. While there's about 20 epitopes on spike that need to change for the virus to escape Nabs there's a few thousand T-cell epitopes that would need to change and many of those will be concentrated in conserved regions of the genome that can't mutate or the virus stops working.
And once you have a mature B-cell response your body can quickly respond with NAbs to prevent the viremia that leads to multiorgan infection. In fact with vaccine boosters it seems we may already have this level of protection, even against Omicron, and the jury is of course still out as to how durable that is and it may be more durable than initial shots were.
Once the virus completes the vaccination campaign the hard way then the pandemic is over and the human race has a new cold/flu virus, and we should treat it like a cold/flu virus. It is also unlikely that we'll continue boosting with vaccines. We're unlikely to get enough people boosting with vaccines every year to make a dent in spread and boosting will mostly be confined to people over 65 and those who are immune compromised. We won't ever boost our way to zero virus.
The "its just a flu" people were dead wrong in 2020, but very soon they're going to be entirely right. That doesn't fit neatly into the way that we carve up our society into Team Blue / Team Red though so its difficult for a lot of people to understand.