People discovered that using messaging can add tons of overhead, and async messaging architectures are harder to manage and monitor. Serialization and going ov

People discovered that using messaging can add tons of overhead, and async messaging architectures are harder to manage and monitor. Serialization and going over the network are an order of magnitude slower and error prone than good ol' function calls. I've seen too many systems that spent more time on marshalling from and to json and passing messages around than actual processing.