Why using Microservices or Monolith can be just a detail?

Nowadays we can often hear that monolithic architecture is obsolete and responsible for all evil in IT. We often hear that microservices architecture is a silver bullet which helps to kill all this monolithic evil. But you probably know that there are almost no silver bullets in IT and every decision entails trade-offs. One of the most favored advantages of microservices architecture is good modules separation. You can deploy every service independently and services are easier to scale.