[nerdponx]

> dedicated event bus

A webhook is "peer-to-peer" and uses the existing HTTP infrastructure that's already in your application. Whereas an event bus is "centralized" and requires a third service to run/maintain/design. I'd like to avoid that if possible.

Also webhooks make a lot of sense for communication between organizations, which you can't do with a centralized event bus (unless someone is out there running a global event bus that I'm not aware of). Let's say I'm using Managed Service Foo hosted by a third party, and I want to trigger some event in my own system whenever certain things happen in side Managed Service Foo. How else do you expect me to receive those events? Surely a webhook is a lot easier than figuring out an event bus to be shared across our two organizations.