I can't see anything you've written about why this virus is different; that's what I've been asking you to do, but you haven't addressed it, from what I can see.
Nevertheless, on the way in which it is widely regarded as being different, I just addressed that in a reply to another commenter here: https://news.ycombinator.com/item?id=27290964
For what it's worth I'm not really saying it's "like the flu" - more that we should expect it to be like other coronaviruses, unless there's significant evidence to the contrary.
I wrote "So far the increase in the virues' virulence with new mutations wasn't correlated with decrease in deaths as far as I know" which suggests the virus is not evolving to be less deadly as you suggest. In fact the British variant was both more virulent and more deadly than the original COVID strain:
This is why I said you were ignoring my point. I specifically didn’t claim that the virus is “evolving to be less deadly”.
My point was that human vulnerability is due to it being novel, and that as more people’s immune systems become attuned to it (whether via contracting the virus, vaccination or being exposed to fragments in the environment), it will become less novel and less deadly to those exposed to it. Therefore, we should still expect the fatality rate to be steady among those who have never been exposed to it, but that will start dropping off quickly as immunity becomes more widespread, which is what we're seeing.
Based on everything we know, a “new” “novel” virus would most likely hit us via a jump from another species, not through continued evolution of this virus.
As for higher fatality rates from B.1.1.7 or other strains - reports about this are contradictory [1], and notably the headlines about it being no worse than other strains are always much smaller/less-prominent that the those trying to terrify us about it being much worse.
Nevertheless, on the way in which it is widely regarded as being different, I just addressed that in a reply to another commenter here: https://news.ycombinator.com/item?id=27290964
For what it's worth I'm not really saying it's "like the flu" - more that we should expect it to be like other coronaviruses, unless there's significant evidence to the contrary.