The 2025 Nobel Prize in Physics honors John Clarke, Michel H. Devoret, and John M. Martinis for pioneering work related to quantum tunneling. Energy quantization in superconducting circuits is one of the foundation for quantum computing based on superconducting qubits. As someone who worked on theoretical aspects of macroscopic quantum coherence and quantum computing during my PhD and postdoc, I am amazed at how quickly the field has evolved.