But I don't think it's accurate enough. For example, the article claims delta based CRDTs don't use vector clocks. But even to decide if a set of events are concurrent it's necessary to attach vector stamps to every event. Maybe the author meant something else when he says vector clocks are not needed for op based CRDTs.
Also as mentioned in article it's true evergrowing event log is not such a bad idea with compression techniques and cheaper disks. But the problem with evergrowing datastructures is not just disk space. This data has to be loaded onto main memory to do anything useful with it. This data has to be transmitted across network to power SaaS apps. So stating that disks are cheaper hence evergrowing datastructures are fine - is an oversimplification.