Beyond the scope usually means: “We couldn’t make it work”
Network Design is like cooking, you can’t just tie yourself to the recipe book.
Network providers shouldn’t go away from providing efficient dumb pipes.
Someone will still have to do all the tedious tasks.
Bunch of compromises and educated guessing.
Past experience can sometimes be a drawback, if you don’t know how to apply it correctly.
Rip and replace tactics almost always results in failure.