I think he's referring to the Hivers as the "ripped off from Niven people"Originally posted by Jeffr0:
... but wolf-people, lion-people, centaur-people, and clearly-ripped-off-from-Larry-Niven people."
[Good joke, but... didn't he mention the Aslan twice and forget the Hivers?]
They share some traits with Ringworld's Puppeteers.
You could make an argument supporting this, but it really only applies if any particular person bought into the published maps/settings in their entirety (as many people did)."The trouble was that every new development wound up choking the original point of the game to death. The Imperium was suddenly hemmed in on all sides of its sadly two-dimensional galaxy; the frontier was closed."
The subsector/world generation rules were always there and people were and are free to generate their own settings; incorporating all, some, or none of the published materials as they desire.
Having no unexplored frontier areas can be limiting, but Traveller doesn't require it. Even if you stick to published settings, there's no reason that a campaign couldn't be set around the Zhodani core expeditions (as one example).