CFRDT (Conflict Free Replicated Data Types) can absolutely reconcile many-writers situations. There are a number of these systems, and they all have their own rules around that replication (sometimes very complicated rules that are hard to reason about). As long as you can live inside those rules, and accept that they are going to have sharp corners that don't quite make sense for your use case, then you can get a virtually free lunch there.

But living inside of those rules (and sometimes just understanding those rules) can be a big ask in some situations, so you have to know what you are doing.