Researchers have developed a novel approach to protecting superconducting qubits from Purcell decay, a major obstacle in quantum computing. By integrating a shared $Π$-filter into the feedline, multiple qubits can be shielded simultaneously, reducing hardware overhead. The filter, consisting of two open-ended stubs connected by a transmission line, leverages engineered passive microwave interference to achieve broadband protection. This compact architecture enables the simultaneous protection of multiple qubits, a crucial step towards scalable quantum computing. The proposed scheme has significant implications for the development of robust quantum systems, as it minimizes hardware additions while maintaining qubit coherence. This breakthrough matters to quantum computing practitioners because it brings them closer to building reliable, large-scale quantum computers, which in turn threatens to upend current cryptography standards1.