First off, this is an excellent talk. The presenter explains the different topics in a way that even a layman like me can easily follow along. The compression scheme he presents at the end seems very interesting as well.

I do wonder if in practice OT isn't a simpler solution for most applications. He mentions the differences in the beginning of the presentation and the main advantage of CRDTs is that they don't need a central server. It seems to me that for e.g. a web app you have a central server anyway so all the extra complexity of CRDTs isn't needed. I know almost nothing about this though, so would love for someone more knowledgeable to explain why I might be wrong.