I just returned from SuiteWorld 2018, where I had a great time and learned a ton. I have to say, the keynote addresses each morning were the highlights for me. The great news about these sessions is that you can watch them in their entirety on YouTube. However, probably the best place to find these videos is on Oracle’s user group website.
You don’t need to be a NetSuite user to get an account on this website. It would be a great place to start if you’re considering NetSuite. Along with videos, there are lots of other great resources, like forums.