I've given up on the USA numbers. There is no way an underlying exponential process is going to deliver you a near constant 30K new infections for nearly 4 straight weeks.
Something else is driving those numbers, and it ain't the actual number of new infections. For me the obvious candidate is they hits some testing limit.
You shouldn't think of it as one underlying exponential process though. It could be many overlapping and time-delayed S-curve type graphs which are additively causing a constant rate of infections.
Although it's also most certainly true that we're vastly undercounting the cases in most (if not all) areas.
Something else is driving those numbers, and it ain't the actual number of new infections. For me the obvious candidate is they hits some testing limit.