worker: motivating examples? #33880

I'm having a hard time figuring out when I would actually want to use workers over a child process.

The docs provide the following motivation:

Unlike child_process or cluster, worker_threads can share memory. They do so by transferring ArrayBuffer instances or sharing SharedArrayBuffer instances.

However, I'm having a hard time finding a case where I would actually use this. Usually I would have either strings or objects that I would like to pass onto a worker. Maybe something like https://capnproto.org/ could take advantage of this? But from what I can see such approaches are actually quite slow in javascript.

Also, from what I understand actually transferring Buffers to workers have some edge cases and could fallback to become a copy.

I'm not saying it's a bad feature. I would really love to try it out and use it. I'm just having trouble finding the use case for it.

Maybe someone could provide some ideas/examples of when this would be useful would be helpful as a point of inspiration?