It's true that at 50-100 physical (not logical) qubits, it's no longer possible to simulate classically. That does not mean that they are useful. As other peop

It's true that at 50-100 physical (not logical) qubits, it's no longer possible to simulate classically. That does not mean that they are useful. As other people pointed out, you may need a factor of 100-1000 more physical qubits to get as many logical qubits.