If I want near-instantaneous compile times with my build system I'll just make a bash script or Makefile and use a single compilation unit (which Rust does not

If I want near-instantaneous compile times with my build system I'll just make a bash script or Makefile and use a single compilation unit (which Rust does not really do). When I use Bazel it is because: - I want to build nearly everything from source in a controlled hermetic environment. No more "well it works on my machine"... only to learn the developer's libs leaked into the build environment. - I want to do this with a single build system that works across many languages, and to build libraries which are used in many different languages. - I want to do this within a sandboxed environment for peace of mind when compiling thousands of dependencies. - I am willing to pay the money and time to setup remote executors to keep performance acceptable.