[pfooti]

On the one hand, I absolutely love working with rxjs on a fairly large angular app as a side project. It affords me the chance to be clever with code, to reason about coordinating multiple asychronous streams, and so on. Firestore gives me observables of the queries I run where the data update themselves, and the user generates events that turn into data mutations. It is all just super great.

On the other hand, I recognize that doing this well and correctly (understanding how to pipe together operators instead of creating lots of intermediate subscriptions manually, which I see a lot in example / stack overflow code) requires a high level of understanding.

It is a whole change in how you think about event pipelines and code structure. I don't think I would want to migrate my day job systems to it, because then you need everyone on the team to develop that understanding. I'm sure they _could_, but working with promises and trad event handlers is a lot simpler, as long as you keep the rest of the data / eventing pipelines simple.