The JW religion will end when they can no longer turn a profit. As long as people keep donating money, they will exist in one form or another.
I don't remember exactly what WT article it was, but it was back in the earl 50's I believe when they changed their stance on refusing vaccinations. As I recall their words were, We can no longer AFFORD to enforce our position on vaccinations. That is not a verbatim quote, but they did say "no longer afford".
They will continue morphing to accommodate inconvenient laws and the flow of $$'s.