How does Monero propose to resolve the fact that it's blockchain is growing faster than Moores Law and pruning is so limited?
Human populations don't grow faster than Moore's law. Duh.
Disk arrays scale to anything we can fathom.
The issue is that no block chain consensus can maintain decentralization of validation, not because of scaling problems but because of the fundamental economic reality that not every miner can have an equal share of the hashrate, thus verification costs are not shared equally. The creates an asymmetry where economies-of-scale will maximize profit and grow hashrate the fastest thus centralizing mining.
The solution requires some clever innovation on proof-of-work.
Not necessarily, algorithms could be programmed to move your funds between coins if an attack threshold is passed--of course this requires trustless exchanges to fill in the gap left by the inability to decentralize mining, and also produces lemming effects if the coin's mining doesn't adjust responsively, though this assumes the attacker is just greedy and not actually trying to destroy the coin. In a full-on attack of crypto, a war to end the battles, the algorithm approach forces the attack to be multi-pronged, but would not prevent coins from attacking each other to gain market share, though my guess is miners would make algorithm adjustments and speed becomes an asset as much as hashing power--I'm rambling possabilities, my guess is that there some noob assumptions to flesh out, if not totally dismiss.