The right time to extract something into a separate service is when there's a problem that you can't tractably solve without doing so.
Increasing architectural complexity to enforce boundaries is never a solution to a lack of organizational discipline, but midsize tech companies _incessantly_ treat it like one. If you're having trouble because your domains lack good boundaries, then extracting services _is not going to go well_.
Increasing architectural complexity to enforce boundaries is never a solution to a lack of organizational discipline, but midsize tech companies _incessantly_ treat it like one. If you're having trouble because your domains lack good boundaries, then extracting services _is not going to go well_.