Consider systems that require continuous active stabilization to not fail because the system has no naturally stable equilibrium state even in theory. Some of our most sophisticated engineering systems have this property e.g. the flight control systems that allow a B-2 bomber to fly. In a software context you see these kinds of design problems in large-scale data infrastructure systems.

The set of system designs that exhibit naturally stable behavior doesn't overlap much with the set of system designs that deliver maximum performance and efficiency. The capability gap between the two can be large but most people choose easy/simple.

There is an enormous amount of low-hanging opportunity here but most people, including engineers, struggle with systems thinking.