Modular monoliths can be a simpler medium. Writing modules of functionality that work on their own (in memory integration test) can easily be tested, separated

Modular monoliths can be a simpler medium. Writing modules of functionality that work on their own (in memory integration test) can easily be tested, separated into microservices or assimilated into a monolith. Be wary of runtime function shared between modules as it will strictly couple the two and risk side effects on each other, tending towards spaghetti. But for monolith quick wins they can help for sharing management dependent resources like database transactions.