Except those things kill at least a magnitude fewer people to render such an observation as mute.
What on earth? You are aware that COVID-19 *is* a coronavirus, aren't you? And also aware, I presume, that influenza has periodically had mutations that have killed millions of people?
Most of the time, these classes are not fatal. Well, most of the time influenza can be fatal, and hundreds of thousands of people die from influenza each year, but still, it's not generally considered a horribly lethal virus. Because most of the time, none of those classes are particularly deadly. But all of them are capable of mutating to be considerably more dangerous than they usually are. All three of those classes of viruses are already completely endemic in humans. There's an extremely high likelihood that this strain will continue to mutate (as do all coronaviruses), and is most likely to revert to the mean for coronaviruses, becoming a common cold. It could take a few years... but your comment about the "risk" of it becoming endemic is misplaced - coronaviruses are already endemic.