What's a monolith anyway? At this point just a straw man to pitch microservices against. There are many ways to modularize code; after all, (class-based) OOP is about code organization via modularizarion. In my experience, "REST microservices" is one of the worst, as it derives its working principles from the unrelated problem of loose coupling of web browser and web servers just because it has to use HTTP for unclear reasons, then applies these principles incorrectly, naively, religiously, and dogmatically, while mimicking a two-tier application model that isn't called for. It's really the mother of all antipatterns.
