[
It doesn't flex as badly as the DT fork on Rob's vid, and they do run 140 mm of travel (I believe there was 160 version as well). Did you actually try one or wobbled/flexed one with your own hand? It's crazy stiff (c'mon, it has square edges) and almost has no stiction under load (needle bearings).
Interesting that Cannondale have put the new Lefty Ocho on their new Emtb Hardtail, the Trail Neo 1