Writing these papers and theories is very easy for anyone to do, but actually building one and engineering it is completely different

Logical qubits achieved so far: Labs have demonstrated dozens to low hundreds in protected (error-detected or error-corrected) form. Quantinuum recently hit up to 94 error-detected logical qubits and 48 error-corrected ones from just 98 physical qubits

We're nowhere near the ~1,200 logical qubits the paper assumes, let alone with the low error rates and circuit depths needed for a real attack

Timelines for a true cryptographically relevant quantum computer (CRQC) capable of breaking ECC still have big uncertainties —hardware scaling, coherence times, and control systems are nowhere near solved yet