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> Ideally we'd have infinite registers: each instruction would read from previous registers and output to a new register. And so we would never reuse any register, and there'd be no data hazards.

Crazy thought but would it be possible to build a decentralized and distributed CPU on top of the blockchain?

Edit: to the downvotes, care to explain? I am genuinely curious to know the answer, and curiosity should be a driving factor in this community

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If the blockchain in question is Turing-complete, then it would be possible (by trivial consequence of definition) to build an emulator for any other Turing-complete (or even non-Turing-complete) deterministic processor on the blockchain. However, the latency per operation would be prohibitively high for most purposes, unless each "CPU Instruction" is complex enough to greatly stretch definitions and lose meaningful distinctions.

So, the answer to the most strait forward interpretation of your question is basically "Yes, it's obviously possible and likely trivial, but probably not practical"

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