Celegorm opens a door and finds himself looking, not into a guest room, but into a bar.
It is not plausible that someone turned this room into a bar, both because it's not a very Noldorin bar and because the room is too big; he built this fortress, he would know.
And, Huan says, it's very powerful magic and it smells of somewhere very far away.
Noted.
He walks in. Worrying about the Doom would be overthinking it. He hopes.
I think everyone in your world dies only if neither of us ever finds a Milliways door ever again? Which is a very long time, considering that neither of us is going to die of old age. And it'd probably be safer to have little me and a chair, if we're going with the chair.
Yeah. If anyone from this world is in Milliways. If no one's in Milliways then the two worlds run along at their separate paces.
By and large, Bar says, if you exit Milliways into another world, time will continue to be paused in your own, unless as a matter of causal fact you will not return there until and unless some event occurs there which requires the passage of time. However, this rule is less consistent than the already imperfect one about pausing while you are in the establishment.
"I assure you it's not warranted. You can read me if you want, Edie did it by accident and did me a big favor in deciding for me that Odette'd want to know I liked her. And you should read Huan, he's really cool - Huan, come meet the alternate-universe future in-laws!"
Huan comes.
"So I see." He lowers himself from Odette's arm into one of the booths. You know, I run a school for children with a trait a significant fraction of society, including a tragically nonnegligible fraction of their own parents, reviles, and I'm all but married to a man who to this day blames himself for the death of his mother and considers himself irrevocably marred by subsequent events. In my experience, people who consider themselves unworthy of the high regard that others have for them tend to be mistaken.
Awww. We kind of killed a bunch of people and left a bunch more to die, though, it's not 'reviled for the way you were born'.
In response he just remembers Alqualonde. The dark. The supply problem, the guesses circulating about the war, the stupid pointless argument between his father and Olwe - politics, all politics - the decision, the confusion and the screaming and the blood...