Trapped atomic ion qubits are the most mature of qubit platforms, with essentially infinite idle coherence time and near-perfect SPAM. The entanglement of trapped ion qubits via discrete gates or more global analog operations proceeds from the same physics, and there is hence a continuous transition between these two models of quantum processing. While the central challenge ahead is the engineering of trapped ion system to scale following some well-defined architectural paths, it will be critical to continue co-designing circuits, algorithms, and simulations to the systems as they grow. This is particularly important as the ion trap architecture enjoys the prospect of a reconfigurable and fully-connected qubit graph at scale.