The point for "microservices" to me is to separate the components of an integrated system to achieve scaling factors independent of other related but not directly coupled parts of the system.

Most systems in my experience don't really benefit from separation of the entire application domain into a set of independent systems. Most use cases don't benefit from decoupling a request/response in a series of asynchronous calls across 20 different APIs.

So, most systems can and should be implemented as a simple abstracted interface inside a single application stack. But then, no one ever gets promoted/hired/funded to build the most optimal solution.