# What utility is provided by the Bloch sphere visualization?

The Bloch sphere is a mainstay of introductions to quantum computing, but what utility does it actually provide? It can't usefully represent multiple qbits because of entanglement and requires a weird transformation to map to & from a state vector. Sure it's a visual representation but I've never seen it actually assist anyone's acquisition of the material. Is it just a holdover from earlier days of the field and the reason why we'll be calling Rx/Ry/Rz with doubled theta values until the stars die out?