Not everyone uses codegen or other tools. You can write generic-ish code in Go which is just runtime checked via vtable pointers (interface objects). And of co

Not everyone uses codegen or other tools. You can write generic-ish code in Go which is just runtime checked via vtable pointers (interface objects). And of course, the loss of static checking means that one has to write more tests for mundane things. But again, designing tests requires "runtime thinking", designing statically checked APIs requires "compiletime thinking".