My point was not that it might not be important, just that you probably do not want to assign a new name to a data structure just because you use a different re

My point was not that it might not be important, just that you probably do not want to assign a new name to a data structure just because you use a different representation. If the implementation would have been in a different language, then adding parent pointers into the B-tree would have been less of a concern and the representation with an array would maybe never have come up. It would be weird to say that this CRDT is based on a B-Tree with parent pointers, unless you implement it in Rust, then it is based on a G-tree.