It can be done and if a POC is legit and the numbers line up it will be done. When energy is primary cost — and assuming enough rigs can be built — the operatio

It can be done and if a POC is legit and the numbers line up it will be done. When energy is primary cost — and assuming enough rigs can be built — the operational scale that can be reached by a 10x-leaner setup will disrupt the network. The computational difficulty (which they will only increase) outweighs the communication challenges of broadcasting the blocks or being first to the mempool. Even the communication costs will likely be driven down simply because of the profit incentives to doing so.