gm could engineers here opine on the design flaws of evm???

math phd dropout // auditor at Quantstamp

Before: @StanfordGSB, Kubernetes @Google, @Blackstone

More that the only way to extend the VM is through adding a new opcode or stateless precompile. Stack/memory model is fairly basic (which is a feature)

by hard to extend, do you mean the social labour of getting an EIP accepted or something else?

Selfdestruct (breaks immutability), function/storage calls not declarative (hard to parallelize), hard to extend (either opcodes or precompiles), requires different toolchain (not LLVM), 256-bit words are unnecessarily large for most ops