I can’t think of another platform (in the sense of programming environment) which is being optimised to be read milliseconds before execution from a networking

I can’t think of another platform (in the sense of programming environment) which is being optimised to be read milliseconds before execution from a networking socket, with more code being loaded on-the-fly from remote servers. In C++, you have all your code at compile-time and even in Python/Ruby/Perl/Bash etc., it would be highly unusual for the shell to anticipate the equivalent of wget -O foo ${URL} && . foo. Given the constraints, having to add some hints doesn’t seem all that bad to me.