"Monolith first." Also, call stack can go pretty deep. You can't go deep with microservices. Everything has to be first hop or you risk adding latency. Also,

"Monolith first." Also, call stack can go pretty deep. You can't go deep with microservices. Everything has to be first hop or you risk adding latency. Also, transactional functionalities become lot more challenging to implement across services and databases because it's blasphemous to share database among Microservices.