Microservices have many benefits — but they are not a default choice for greenfield projects.

Monoliths have strong advantages that service-oriented approaches cannot offer:

• the whole app is deployed as a single unit: if it compiles, cross-module integration is likely correct
• development and refactoring are simpler: the compiler helps to track if changes are complete
• cross-module calls are synchronous or close to synchronous, taking less than 1-10 milliseconds
• testing is easier, with clear targets of integration and e2e tests
• debugging is simpler: spin up the app locally, set breakpoints, attach a profiler — and you have the whole system for inspection

When monoliths are OK:

• small projects
• small teams
• unclear domain
• unclear scaling requirements

...basically, in most new projects.