Ask HN: When do you start using microservices in your sideproject or startup?

Microservices have lots of benefits (from isolating code, to letting different teams work independently). But they also have costs (e.g. complexity of deploying and debugging). In your sideproject or startup, have you been using microservices from the start, or did you find there comes a point when microservices make more sense?

Any thoughts on when the scale tips over in favor of microservices ?