This is the first version of the Soylent powder that has any appreciable amount of soy in it. Prior versions used soy lecithin as an emulsifier, but had no other soy.
[1] https://faq.soylent.com/hc/en-us/articles/205682935-Soy-Prot...
Edit: to clarify, 2.0 is a prepared soy-protein-based drink which, until now, had a very different formulation from the 1.x powder product.