Do I understand this change correctly?
I understand that a generation is basically defined by one of two things, (wikipedia) A womans offspring, or a cultural event.
In this case the JWs view the 144000 as a family of anointed christian brothers (12 tribes) with a mother the Jerusalem above. The latter brothers experienced an event. (1914) with some brothers coming after the event. One generation. Overlapping siblings.
Admittedly this generation could go on forever but I can't find reason to argue now with the idea.
Do I misunderstand this?