connected with the generation timeline was also the concept ot the wt writers' "judgement period".
To even the playing field, that doctrinal twist suggested, that anybody that died during a proclamation of impending doom by jws, you were on the spot subject to the current judgement terms, . even if you died before the judgement was executed, at the end, you were already a goner.
No wormhole tunneling into the new world possible. your lifetime was vital.