New converts in developed countries are dwindling that's for sure. People being baptized these days largely consist of lonely seniors, mentally challenged adults and children born into the religion. It's apparent that if the Jehovah's witnesses don't start popping out babies at a faster rate their baptism numbers will go stagnant.
Imagine an ASSembly where there is no baptismal talk? From some posts here about very few getting baptized at conventions, that may someday become a reality. (Or they will start having actors do it just to make the R&F think people are still coming in🙁)
I think the question of using such an insignificant group to herald the end of billions on earth would be a very interesting question to ask next time a Jehovah's Witness comes to our door or we see them on their literature carts. For a God who desires "all to be saved" he sure has a funny way of showing it.