The impression I always got was that "soon" referred to the next few years. And even that stretches the definition as we typically use the word. I knew many JWs (and heard of many more) who felt that way. I was in high school in the early 80s, and did not expect to graduate before the end came. Then we were expecting it at any time before the year 2000, as the WTS appeared to. After that, it became more of a general expectation, but I am not sure because by then I was well into my fade. Every time I've spoken to my mother in the last 20 years, she has tried to impress on me that the world situation is so bad that things cannot continue much longer and the end is close.
I'm not sure she even realizes how often she has been telling people how close the end is. Forty or so years at the very least. If you had approached her in the 1970s and told her that the end was close, but would not arrive for another fifty years, she likely would have dismissed such a statement as nonsensical and idiotic. How could one have a sense of urgency for events that were still a half-century away? Each passing year makes it more nonsensical and idiotic. But since they've been waiting for "soon" all of this time, it is difficult to recognize the larger picture. Imagine deciding not to have children because the end will come in 50 years? Or putting off a college degree? Or a career?