I agree that a mass exodus is not going to happen for a variety of reasons, but I also think the publishing house that they enjoyed for a century or so is over. Just like many newspaper and magazine publishing houses that are former shells of themselves. The big major ones are still around but their influence is somewhat diminished.
This is why the WTBTS is selling the expensive properties in NY and elsewhere they are no longer needed. At least now they will have to continually adapt with the internet and compete to get their message out. That's why the indifference witnessed in the trolley cart witnessing
Then there is the third world countries were they can continue with publishing the way they have always done at least for now.