You can't get guess these things before they happen. > do you think there should have been an innovation since then and another competitor maybe? What does "s

You can't get guess these things before they happen. > do you think there should have been an innovation since then and another competitor maybe? What does "should have" mean? There's no conspiracy to suppress the development of alternative approaches, there's no council or committee which decides these things - people would love the discover something new and amazing which is better, they just haven't been able to do it.