if it is pruned, then archival nodes will need to be trusted. Guess who will be running the archive nodes?
hundreds of thousands? Really. Amazing how many charitable people there are all just hosting a multi-TB/yr blockchain with hundreds of dollars per month bandwidth cost. Why not claim millions or tens of millions of people would? Even better, a billion people would. See I can make up numbers just as good as you. However, historically speaking when people have to keep paying for something that doesnt get them anything in return, they stop. And since the corporate run servers provide SPV service, there wont be any incentive for the masses to run a node. Other than altruists and purists. There are 100,000+ of those around? What basis do you have to support this?
And with sharding, how exactly will data from different shards get synchronized? I know! via the massive nodes that are run by? Guess who, yes, the same ones running the archive nodes. And what happens if there is a dapp that accesses data across all the shards?
So you just support my position that technical forces combined with economic and bandwidth constraints will force ETH chain to become centralized. And once only large corporations are having the full blockchain/shards/archives, how hard is it for pressure to be applied for KYC conformance