This is something we will not be able to understand for a very long time. Here's something to consider. How do angels travel through space? (And I reject time travel altogether and I'll explain why in another post.) The angels travel through the vastness of space exactly how you described, or at least exactly how we understand it. Folding space, also know as a wormhole etc. But they can do that because they do not have physical bodies. I think in order to do the things that require space travel, we will need to know how and understand what it is and what it means to resurrect someone. I do not think it will involve literally dying, but I think it will be close. The technology will have to "flirt" with death....it will have to suspend the laws of physics, unless Jehovah has already built them into the physical universe. Otherwise we will have to move into the realm of the spirit world. We are confined to this physical plane. At a certain point we would have to evolve beyond this plane, and I have wondered in the 144,000 going to heaven was always part of Jehovah's purpose but in an ever expanding way?
For a knuckle head like you, Nomex you bring up some good points.
All joking aside, I do think humans will ascend beyond what we are now as flesh and bone at some point in the distant future. It might be up to us what we want to do. There will always be humans probably, but I think this stage is just the beginning. It might start out changing our bodies to a different type to survive on different planets. Once we get bored with that there will be a new phases and new phases after that and new phases after that, always learning, always exploring, always creating, and on and on forever. Jehovah always does things in stages, right? And we're told we can't even conceive of what he has in store for us. That's what I think he means by that.
That doesn't mean we can't guess and incidentally be right about certain predictions. Space travel, for example. I'm almost certain we will do that. But even if we're right about XYZ possibility we won't be able to fully appreciate what that will mean for the people alive at that time.
Similarly to how people saying computers would be a big thing back in the day even before the internet. They had no clue just what that would mean for us today. They literally could not conceive of it. Just imagine how much more so Jah can surprise us! So just because we cannot conceive of Jehovah's plans isn't an indictment against using our imagination. I love this stuff. It's real to me, so I reflect on the possibilities a lot. I recognize I'll be wrong 99% of the time. It's the uncertainty that makes it intriguing.
Here's a theory about how prayer doesn't need to travel anywhere to be heard by Jah. It's intercepted instantly because somehow God in still part of us. He's connected to us even now, even in our broken state. Maybe angels can travel in such a way, because humans and spacetime are somehow interwoven in the fabric of reality on the very small scale of things, which I am sure is somehow connected to God's spirit. I'm thinking something like quantum entanglement or something like that we have not discovered yet.
It's either that or maybe they're like the angels in Dragon Ball Super. They can use time travel but only under certain conditions.