I don't know what Shimano's whole deal is currently? I mean... obviously, the materials are available to make things lighter, but for whatever reason... they won't? Is this implying that Srams stuff is breakable? Or what?
That said... I suspect that sram is going to be at a significant disadvantage when it comes to disc brakery for cx... because with shimano having the electronic stuff... there's room to stash a master cylinder in there... and thus, hydraulic discs.