[hythloday]

Large networks of small programs fail in exactly the same way: static typing fails on versioning issues (an RPC call carries inherently less type information than a function call) and compile-speed problems (compiling 200 small services can take just as long as compiling one behemoth). We also don't have mature tooling for the "network program" you're talking about.

I don't know what your metric of "large program" is, but AAA games often weigh in at 10-100 million lines and are typically architected as a single large codebase with auxiliary small programs, and doing them any other way is not a sensible approach.