People can be changed, it just takes time and it might be hard. It also depends on how open-minded they are. Also, with technology, you have the additional problem that many people still don’t understand most technology even on a basic level, and they might not know anything better than what they’re currently using. If you show it to them, it might not even be so hard to get them to change. So I think there are a lot of factors at play. But even in the hardest cases, hard doesn’t mean impossible.