As of this morning, NJ's reported deaths was at 539.
It appears to me that people are not very good at mentally keeping the different numbers associated with the different scenarios. People hear "best case: 100,000 deaths" and don't really get that "best case" means "if we ignore everything else and totally focus on the virus". In the same way, "worst case: 1,750,000 deaths" means "if we do nothing special and claim that it's just like the flu". In very short order you see people claiming online "only 100,000 people will die of this, it's not a big deal, ignore it" and genuinely not understanding the part about "if you ignore it, the number of deaths will be an order of magnitude greater". And of course every expert asked gives not a single number but a range for both best and worst cases.
Infectious disease experts still consider a wide range of outcomes plausible.
fivethirtyeight.com
Even if the experts' opinions were overall accurate, once this stabilizes you'll find plenty of people saying "They said 2 million people might die and that didn't happen, the experts are clueless" and plenty saying "They said only 100,000 people would die, the experts are clueless", genuinely not getting that both numbers were forecasts
depending on what actions were taken. An extreme example of this is that you can easily find people saying "In the 1980's they claimed there would be an ice age and now they claim there is global warming, it's all BS" and genuinely not remembering that the "ice age" talk was
a predicted outcome of a nuclear war, which obviously we didn't have. Nobody was predicting in the early 1980's that an ice age was going to happen on its own. But people remember vaguely something about an ice age being predicted and then apply their own bias to conclude that experts never know what they're talking about - unless you happen to agree with them, in which case they're totally brilliant.
I think this same kind of bias is in effect when people say "in bad flu years, it kills 5k people a month" and don't really connect that to the total number of people we can treat for a serious flu at one time; the influenza death rate already has baked in that we have hospital beds, respirators, PPEs for medical staff, drugs stocked, etc. to handle that many cases. What happens if a flu season happens to be 10x worse than usual? Well, read up on the 1918 flu season and you'll see why people are worried. It's a useful comparison partly because travel was much less, so we can look at St. Louis as an example of "best case" and Philadelphia as an example of "worst case" - again, this maps to "take it very seriously" vs. "shrug it off".