I know microservices and monoliths are a heated topic. However breaking up complicated code to preserve user experience is sometimes essential. However you can

I know microservices and monoliths are a heated topic. However breaking up complicated code to preserve user experience is sometimes essential. However you can have machines that contain many services and that interact with each for performance if needed. You would put them into pod groups while deploying to kubernetes and have them call their service inside of the pod. This can increase performance and through put.