Author here - your ninja edit is one of the core premises of the entire post. Some other folks have addressed the scalability questions you raised, but i'd add

Author here - your ninja edit is one of the core premises of the entire post. Some other folks have addressed the scalability questions you raised, but i'd add - I am in no way advocating for monoliths as a better approach. Rather, both have tradeoffs you need to think through before adopting. Thanks for taking the time read.