What foundational quantum breakthroughs matter for practical software use?

[Evelyn.L]

I work in classical software development, but I've been closely following the news about quantum computing breakthroughs, particularly around error correction and increased qubit coherence times. While I understand the basic principles, the practical timeline for achieving fault-tolerant, commercially useful quantum computers seems to shift with every new headline. For those with a technical background in this space, what recent developments do you consider truly foundational versus incremental? How are you evaluating the real-world potential of different qubit technologies like superconducting circuits or trapped ions, and what are the most significant engineering hurdles that remain before we see quantum advantage for problems outside of specialized simulations?