Conference Organizers - Transformative Program Design & Platforms

Have you attended any amazing conferences -- conferences that changed your life, that you've seen anchor a new field or build a new movement? A conference that was more than a conference -- that provided the architecture for you to adapt to a whole new way of working and collaborating? If so, I'd love to learn from you. I'm looking to learn from best practices in conference program design, from your experiences of the best programs you attended, to understand how the best of the best collaborative platforms were built. If you have only a moment, drop a link to your best conference experience in the comments? And if you have more time, drop me a line? Would really appreciate the opportunity to interview you.