Steve doesn't consider quantum mechanics too closely; he has the base intelligence for it, probably, but not the bent of personality required to pick through all the implication without losing his mind. Still, it's occurred to him that any encounter in the Nexus might have a ripple effect across any number of adjacent worlds. Maybe the fact that he and Thor are talking about this could indirectly help other Thors and Steves they'll never know about.

Or not. But he doubts they're hurting anyone.

"Well, I mean it about pizza delivery. If your people need something--food, water, medicine, clothes--I'll make it happen."

Steve gives a half-grimace, half-chuckle at Thor's joke. "I wasn't gonna be the one to say it. There was some trouble with the king's cousin, but that's...a long story, and he handled it. I wasn't even in the country at the time, but that's probably just as well. I don't think he'd have wanted my help."

"He does have a little sister. Cute as a button, but I think she might hit me if she heard me say that." Or maybe she'd just laugh; Steve says it like an old person complimenting a friend's grandchild.

"She's also a genius and she's basically given Bucky a new lease on life, so I'm...real grateful." Which is a tremendous understatement. He doesn't know what they'd have done without Shuri's help.