We really need completely open source stack for the applications themselves, and few enough deps that they can run and be debugged locally. Not only that, but one shouldn't need to provision a cluster and configure certs just to run some business logic that's unrelated to infrastructure.
That said, check out Nats.io. It's basically just a messaging system but it's beautifully abstracted, horizontally scalable and runs locally from a small binary. It largely removes the need for much middleware like load balancers. They've also recently added persistence features for streams and KV stores.
It doesn't solve every problem but I do think a message system is a very good core abstraction to build other things on top of.