This stack is very appealing though I'm not sure it's quite fully ready for primary use. Has StimulusReflex-CableReady figured out pushing new data to the client outside of the request cycle? Last I looked there was no way to trigger a client page update from a background job for example.
This is exactly what CableReady was built for... to update the DOM from any Ruby process (in the request cycle or not). It was designed from the beginning to update the DOM from out-of-band non-request based workflows like background jobs.