But the article is arguing in favor of OT, not CRDT. A couple examples of those edge cases would go a long way, the one given is not very helpful to make a point.
What's wrong with the one given? If my cursor moves because some other user makes some other text bold, that doesn't sound like a desirable experience?
Because it doesn’t highlight a particularly relevant deficiency of the CRDT protocol. Preserving cursor position is not hard in that case. The post even mentions stronger downsides of OT, the example does not support the conclusion. Why is OT better?