Regardless of single pilot certification requirements and cost savings involved, there is always the suspicion in most pilots minds that if they personally were to be a passenger on such aircraft, they would prefer to have two experienced pilots in the cockpit rather than just one man/woman. Sure, many airlines are happy to crew big jets with one experienced captain and his apprentice just out of flying school. The passengers wouldn't have a clue who is up front but presume they are grizzled veterans. Something about where ignorance is bliss, 'tis folly to be wise.
On a dark and stormy night it is no fun flying single pilot IFR - even with the most sophisticated electronics. That is when you need two up front to check on each other and even practice your CRM
