Somewhere I picked up that almost all Magic systems in the Cosmere can be powered by any kind of Investiture. So a Radiant from Roshar could eat a metal from Scadrial and then use their Radiant abilities. If that is the case than could Characters from Warbreaker like Vashyr or Vivenna acquire almost Infinite Breath when they get to a system where Investiture exist in abundance?
Worldhoppers that use Breath like Vashyr who traveled to Roshar, could they acquire almost infinite Breath with the Help of Stormlight?