Researchers have made significant progress in developing multi-qubit fluxonium architectures, with a focus on utilizing transmon couplers to enable high-fidelity two-qubit operations. The transmon coupler approach has been experimentally demonstrated to facilitate fast and reliable interactions between fluxonium qubits. This breakthrough is crucial for the development of large-scale quantum computing systems, as it addresses a key challenge in scaling up quantum architectures. The use of transmon couplers allows for tunable coupling, which is essential for maintaining control over the quantum states of the qubits. Furthermore, this approach has the potential to mitigate crosstalk, a major source of error in multi-qubit systems1. As a result, the advancement of transmon coupler technology is a critical step towards realizing the full potential of quantum computing, and its impact will be felt by practitioners and researchers working to develop reliable and efficient quantum systems.