It is still more dangerous than the other endemic coronaviruses that cause the common cold. In general the selection pressure on viruses (and other parasites)

It is still more dangerous than the other endemic coronaviruses that cause the common cold. In general the selection pressure on viruses (and other parasites) is to be less disruptive to the lives of their hosts -- not just being less deadly, but also not incapacitating hosts for extended periods of time. How long it takes for a virus to become endemic-without-ill-effects can vary widely, but the hope here is that COVID19 will do so quickly, becoming "just another common cold" within another year or two.