Normally, when you step into a new type you get some kind of transition training to make certain you can fly the thing before you're set loose. This didn't exist at all for Ex/Ab, and a lot of the fatals were guys in their first flight of their homebuilt, or someone transitioning in. Pretty understandable with folks transition into fire breathing little aircraft that fly like nothing else. The problem is you can't charge anyone to train them in your experimental airplane. At least you couldn't. Others can chime in with more knowledge than I, but apparently now it is possible to get some degree of transition training in your homebuilt or in the aircraft you're purchasing. The FAA makes exceptions in the name of safety, which they should. And I believe things have gotten better.