For us at my present and former workplaces, the decision of using microservices didn't depend solely on number of developers. We needed something very scalable, something that different teams can work on without stepping on each other's foot, something that survives even if part of it fails temporarily, something that auto-heals.
We did it with developers in the tens and we didn't have much issues with this approach. In fact, at one of my workplaces we had much more issues with a monolithic app than with the microservice based app we replaced it with.
We did it with developers in the tens and we didn't have much issues with this approach. In fact, at one of my workplaces we had much more issues with a monolithic app than with the microservice based app we replaced it with.