I have to wonder what goes through Arthur's head when the Drifter disappears for whole loops at a time due to missions in the present day that call for it. Wonder how worried he gets... probably a lot, but maybe not too much because the loops continue/meaning the Drifter's powers are still active... right? The Drifter hasn't died yet.
...but he won't know that until the year "ends"... so a whole year of worrying, possibly things going to shit because Drifter ain't there to do the reset early.
But technically, there's a POM-2 on the Orbiter... I bet they keep in contact through it.
Is that how the loop works? I would assume that the loop would collapse any moment if the drifter ceased to be.
But even if that's not the case, it's implied that the looping was a thing even before Drifter got there, cause Drifter somehow knew all these things despite us not being there. (Except for that one time we went for like five whole minutes but we didn't leave the mall).
I really do believe Drifter stays in 1999, since Operator can handle themselves, especially after the Focus School upgrades.
And there's no lore indicating that they have left 1999. ...after all, if you get a New Year's scene, it's pretty damn clear Drifter has to be there for it to happen.
But it does give room for Drifter to be away on all other days, since they're not needed to keep time moving.
As for the time loop itself...
Before Drifter arrived, it seemed to be a one-day loop:
Given how much Loid has studied the Indifference, I think "make no sense of it" means something he hasn't studied made the change. Perhaps... the Drifter has that power. ...but I can't find out who or what is powering it.
In Duviri's case, we know it still holds because Drifter gave the control over it back to Thrax. ...so if, say, Wally is the one who created the time loop as a means to try and weaken the timeline, it could mean he keeps the loop going...
...slamming his fist like a little baby because Drifter loved the Hex too much. lol
HOWEVER, even if that's the case... ya don't wanna leave them with him for too long...
"If you're wasting your time here, who's protecting those freaks back in Höllvania?" (Isleweaver)












