What technological advance is there for high quality complex software?

The advances that made Apple Silicon possible were, fundamentally, TSMC and ARM. These were the material conditions that had to exist in order for a tech company to capitalize on a new generation of vertically integrated chip design. Now what's the conditions for next generation Mac OS? What research advances or software engineering paradigms that are mature enough for adoption? The state of Apple software isn't just due to mismanagement, it is, but the success of the hardware entails technology nodes as a confounding factor.