What is Quantum Advantage Really ?

A Reddit user questioned the practical necessity of quantum computing in December 2025, arguing current hardware limitations undermine claims of "quantum advantage" compared to emerging, more scalable computing paradigms. The post challenges whether quantum algorithms offer unique mathematical capabilities, dismissing entanglement as merely a probabilistic tool rather than a fundamental breakthrough for computation. Skepticism centers on quantum computing’s unstable hardware and unclear superiority over alternatives like probabilistic classical methods, which may achieve similar speedups without quantum overhead. The user demands concrete examples of quantum-exclusive operations—tasks impossible or significantly slower on classical systems—to justify ongoing investment in the field. Critics highlight the lack of near-term hardware viability, questioning if quantum computing’s theoretical promise outweighs its practical drawbacks compared to advancing classical alternatives.