Kinda missed this in the bundle of replies, so replying now. The latter could be, yeah, but I feel like people are misunderstanding that my claims and your claims contradict each other, so I ought to thoroughly clarify my part of how Rimuru travelled FROM the end of time and space TO a point where the world was not destroyed, and what the "Garbage" was.
Rimuru crashed into something while using the Space-time distortion path
When Vega[and Mai] were trapped inside the Subspace and the others used Breakdown Nostalgia on Vega, it was basically this point:
After they were lost in Subspace, Mai stated that that she could still "jump through space-time" for some reason
However, just during this monologue, they encounter what's called a "Space-time storm", and Mai got caught up in it.
So basically, Mai was the one who got caught up in the Space-time storm. The "Space-time storm" is the Space-time distortion path.
It basically transfers whatever is caught up inside it to a random Dimension, and that's where Mai ended up in, as "Garbage" inside the "Dimension" and inside the "Cardinal World" but outside the Cardinal "Universe"[basically she ended up at the same place as where Rimuru was at "Beyond Space-Time, the Empty Extra-dimensional space outside the timeline], and during that "transfer/jump", Rimuru bumped into her when his first attempt at time wrap failed.
So basically, this is how Mai[the "Garbage" that Ciel mentioned] ended up bumping into Rimuru. The "Space-time storm" basically BFRed Mai from Subspace[outside the "World" and "Dimensions"] inside the "Cardinal World" where she bumped into Rimuru[Just because Ciel mentioned it was "Garbage in Subspace" does NOT mean Rimuru was inside the Subspace at any point, no].
Now, wasn't Rimuru already at the end of the cardinal world? Then how did he bump into Mai INSIDE the cardinal world? Well, remember that Rimuru used Time Wrap
twice, the first time, he did a "mistake", and the second time, well, we don't know[cliffhanger-kun]
So basically, Rimuru used Space-Time wrap once, but made a mistake. This "mistake" was that he didn't directly go to the point he wanted to[aka, in front of Feldway, like he did in WN with Yuuki], rather, he jumped to before the Cardinal World was destroyed, but he was still outside the Timeline/Universe[same thing as "Beyond Space-Time; he basically reverse-travelled from "End of Space-Time" to "Beyond Space-Time"]. After that, he used the Space-time leap again, and well, cliff-hanger strikes...
To simply, we can put it into
this order.
Completely agree
Pretty much, or well, he could do it like what happened to Mai.
I think I described my viewpoint quite thoroughly in this reply that I'm writing, now.
Actually, I think now we may have a better chance since we now have an explicit statement regarding the "beyond Time and Space" and "Outside the Timeline before the end of the world" being an extra-dimensional space.
Before ending this, I want to clarify "How did Rimuru time travel then, if he was at the end of the world where the Hypertimeline had ended?", well, its via travelling in the Time axis/"Time" of the Dimension that contained the Cardinal World [since well, we know that Dimensions contain self-enclosed other-worlds like the cardinal world itself]
After this, I won't be replying until tomorrow, so there may be now reply for around 12 hours.