If someone asked me to change their Strawberry Perl installation so that it uses myrandom instead of Perl_drand48, I don’t know what I would do. I don’t know where I would go on the Internet to get an answer. However, if I did find a cookbook recipe and figured out how to do it, then there would be a 30% chance that I would forget to update $Config{randfunc} (which is the commonly accepted method of determining what program is ultimately called when you or I call rand() in a Perl program).