Given that the machines that make up the Faro Plague only contained land based machines, it seems somewhat unlikely that given that Ted intended for the Chariot Line to become an entirely functional fully automated system that could handle any situation, given the lack of a dedicated machine to Air, Water and Space environments would seem to be somewhat of a deficiency in the overall design, and given that GIAI has access to water and air based machines and NEMESIS is a giant space based machine
Given that in the Datapoint Dagger In My Boot, Walter seemed confident that before he had inadvertently caused the end of the world, Ted was in the process of creating his next project, giving that Ted viewed the Chariot Line as his defining achievement, maybe he intended to reveal an upcoming update to the Chariot Line that would include machines dedicated to those environments, with possible names being Tefnut for a water machine, Nut for a Chariot Line machine dedicated to the sky and Ra for a space based machine giving Ted’s tendency to name aspects of his work after Egyptian mythology
With the possibility that in order to defeat NEMESIS Aloy would at least in part need to use the technology that ended the world in an attempt to defeat NEMESIS, with the possibility that she would be rightly worried that if in using such technology particularly in a hypothetical space based machine with the replication/nigh unbreakable security of the Chariot Line to defeat NEMESIS would lead to the end of the world again by another catastrophic disaster
With the possibility that Aloy and Beta would not trusting the Chariot Line in the capacity to go out of control, would use the technology of the different companies that Walter mentioned while building their own anti NEMESIS like machine with a series of fail safe systems that would ensure that they would not become a threat to the world,