"Expert system" running a company is never going to happen unless shareholders are okay with no accountability from the company. You'll always need someone to blame in case things go wrong. You could have an executive using such an "expert system" for literally all their decisions, but it has to be a human being signing off on those decisions. There is no way to prosecute code and unless these expert systems can become sentinent or appear in court, best of luck trying to let it run a company in the real sense of actually making those decisions with full autonomy and responsbility.