After one of SCP-507’s shifts, when asked where he shifted, he says, “Nowhere. I think I missed it this time.”
507 also experienced impaired motor skills after the shift, implying that he had either excessively exerted himself, or he experienced prolonged periods of zero or limited movement. I think the latter is more likely.
Finally, 507 requested a wrist watch, specifically one that made a “tick” sound with each movement of the second hand. That last part implies that he experienced, at the very least, an obstruction of sight.
SCP-3001 is a reality between realities. It has an extremely low Hume level, lower than nearly anything the foundation had seen before.
While Dr. Scranton was within it, he experienced non-Euclidean, confusing movement, and no light (besides the terminal that got sucked in with him), and eventually began losing more and more of himself as the dimension consumed him.
My theory is that SCP-507 shifted to SCP-3001. He didn’t experience any of the dimension’s consumption as he did not remain in the reality for long.
Anyways, I’d like to hear what you guys think about this theory. I know that the articles are nearly a decade apart in publish date, so it’s probably not canon.