Exactly, but if I play a game set in 1105 3I, the map should always be the same. What happens in the future will not change the 1105 map, or shouldn't anyhow. The setting may develop, but unless you are writing specific retroactive changes, why would the future change the past?
The setting advances in time. Of course. These changes would be on whatever date map you put out next. If I have a street map from 1955, I expect it to be more or less accurate in 1955. If I use the same map in 2024, somethings will be the same, but not all. So, a map for 1105 should be accurate in 1105. That is all I am saying.
i think you misread what he said.
Because settings/universes develop. Writers get better ideas, the real world changes and has an impact on fictional universes, new inspirations take hold. This is true for every long-running universe I can immediately think of (maybe not Dune?), and it is (and should be) true for Traveller too.
He didn't say that time passes IN GAME, he said time passes OUT OF game, and that has an impact on the fictional universe. Meaning, yes there may be retroactive changes. And more, there may be changes that should be applied retroactively, but no one takes the time to go do so. So if you have a UWP for a world that was created in 1995, and the UWP is supposed to be for 1105 3I, and then a new book comes out in 2024, and there is a different UWP for that same world, in 1105 3I.. that's ok. That happens.
A good example of this is star generation - over the (real world) years, we have learned a lot about star generation, and early generations of games which had star generation, have been redone with completely different star generation as we have learned more, and this has sometimes retroactively changed what stars exist where depending on the game.
Traveller UWP is the same - as we learn something in the real world, a new author may go 'huh, this UWP for this planet isn't quite what i need, and i don't recall anyone else using this planet significantly, so.. we're just changing the UWP so I can write a cool story using this new thing we've learned.' And MongooseMatt (among others) is saying, that's ok, and is the kind of evolution that was always intended for Traveller.