I would love a non-trivial demo app or webcast that uses some of the components (eg. service + DB + static site + multiple workers) to check out the configuration required to make everything work together.
Maybe examples of how server/workers communicate, support for RPC, event queue. I'm in the process of figuring out all this stuff and App Platform sounds perfect, but without a starting point it may become more straightforward to take the platform-agnostic approach and spin up droplets where I control all of this.