> My rule of thumb is "could this service be spun off as a separate business?". E.g. postcode->address service, sure, microservice that. Image manipulation serv

> My rule of thumb is "could this service be spun off as a separate business?". E.g. postcode->address service, sure, microservice that. Image manipulation service->maybe yes, maybe no, "user" service-> no, price calculation service->no Curious: why would a "user" service not be viable as a separate business? There's always space for one more authentication option.