Please forgive me if I'm being dense, but I was asking for a source to the claim that ShapeShift (in particular, since you singled them out above) could "easily" be used to launder "millions of dollars." After reading through these links, I'm still not convinced. Only one link you listed mentions ShapeShift, which to some credit, suggests a theoretical, many-step, multi-blockchain process for using ShapeShift in such a way.

My understanding still hasn't changed that "moving large amounts [with ShapeShift before AML/KYC] was difficult, impractical, slow, and exposed to a lot of market value risk," but I'm interested in evidence to the contrary.