If UA, WN & AA continue to fly the MAX for the next week or so, I'm guessing everyone will have their own row in economy until the panic subsides and/or facts comes out; those who choose to take the flights at least. Might end up being the best ride in coach, assuming the MAX don't get pulled from the schedules and temporarily grounded from lack of customers.
The flip side might be the majority of the country remain neutral and flights will still be full to the brim.