In safety critical applications everything is very conservative by necessity: they are complicated systems consisting of many parts, ensuring correctness requires a rigorous workflow and complete toolchain. They involve not just multiple people but whole industries (think automotive).
Most innovations fail because they do not integrate in the existing chain. Radical change can be accepted if, and only if it has extreme potential (orders of magnitude), because the existing methods are continously improved by small steps as well.
Most innovations fail because they do not integrate in the existing chain. Radical change can be accepted if, and only if it has extreme potential (orders of magnitude), because the existing methods are continously improved by small steps as well.