Monolith First (2015)
If you don't have a product yet or the parameters could change quickly with new business insight, you need to be able to change it fast. With microservices you will be spending half your time figuring out orchestration, building data flows that people can understand, and doing ops. Last startup I was in delayed their launch date for >6 months because of their architecture. Way too many people think they need it, but a load balanced monolith can take you from 0 income to able to hire more engineers.