I wonder if this is what will help scale blockchain up to the next level. AVA is using two key innovations that make repeated sub-sampling a perfect method to speed up consensus without compromises. One is in the insight that the random sampling + sub-sampling can be applied to consensus in permissionless systems. The second one, is mathematical proof that it works in such systems.
https://medium.com/avalabs/ava-is-scalable-sampling-3adc2601bfa6
Thoughts?