NOTE: This was originally supposed to be a discussion of parallels between Neomuna and the Last City, but this idea seems too important to leave as part of another discussion. The Traveler has been a central, visible force in the Solar System, so various factions are drawn towards it in one form or another. The Eliksni wanted to reclaim the Traveler after it abandoned them; Ghaul and the Red Legion tried to cage it to claim the Light for themselves; the Hive want to take its Light, and are in service to the Witness. Because of this, the Guardians and the Last City have been constantly at war with those in pursuit of the Traveler for centuries. However, although the Traveler was dormant on Earth for centuries, with no Last City established until around the time of the Iron Lords, [i]the Vex seemingly ignored the Traveler and went after the Veil[/i]. Even when they couldn't retroactively insert themselves into the immediate area around the Veil, they went so far as to place a simulation akin to the Endless Night over the area, hiding Neomuna from the rest of the Solar System in the process. The Vex acted in this manner when it came to Neptune and the Veil, but they've all but ignored the Traveler for centuries. Even when the Vex did make a direct attack on the city during [i]Season of the Splicer[/i], the Endless Night was orchestrated by Quria and Savathun, not by the Vex Collective itself. But it showed the Vex could make an incursion directly into the Last City if they wanted to. Even if the Traveler's immediate presence has a similar effect to the Veil, and can prevent their temporal excursions, they could set themselves up outside its range and fight their way toward it. This isn't to say the Vex have no interest in the Light. [i]Curse of Osiris'[/i] was about Panoptes finding a path to absolute victory after the Traveler's awakening, and it had to do with the Light. It could "see" Sagira's Light, and abducted Sagira as part of its pursuit of said goal. But that was a recent event. Their incursion on Neptune occurred not long after the Collapse. To add to the point, we know MSund12 was scouring the research logs about the Veil from the recent Veil Containment log and registered as a Vex signature. They want information about the Veil, specifically. There was even enough information in the Vex Network's records for Asher to manually piece together a simulation of the Veil. Perhaps it is due to the Veil's nature as a "web of consciousness", a way for the Vex to develop paracausal simulations as Chioma Esi said. With one last Veil Containment log, perhaps next week will give us an answer, or at least point us in the right direction.