When we met just a month or so ago you didn't tell me you were adding CRDTs!!! This is very exciting news. Dominic had mentioned a specific type of CRDT he had added (but wasn't generalized).
Append only logs have overhead that would make it a poor choice for most realtime applications, like GPS tracking, yes FPS games, google Docs, website creators, and many more. Basically any use case where data mutates.
In 2010 I used and built all my own custom event source system, I was the hugest proponent of this / append only logs. It was so futuristic. But 4 years in I hit all sorts of scaling problems and had to redesign everything from scratch and that is when I found CRDTs. On all accounts they are superior, in a mathematical or logical manner, because they are a superset to DAGs, immutable/append only logs, and many other popular data structures. Not apples and oranges.