Some questions to devs please: what's the chance to see it implemented in Bitcoin? Would it take very long? What's the biggest obstacle?
It would need to be post-pruning to prevent DoS attacks.
EDIT: But to be clear, it gives ~0 benefit until you hard-fork to significantly increase the transaction rate.
maaku, can you provide a link to how Bitcoin would prevent similar DoS attacks (without checkpoints that is)?
I'd like to address that critique, but I don't know how it's solved in Bitcoin.