chevvron wrote,
It's an unnecessary waste of money as only a very few ATC units can make use of the extra information.
But for those that currently can, and more will follow, that extra information is worth its weight in gold and is allowing significant safety nets to be added to the system. I would hate to go back to being without it.
For a retired air traffic person you have a very backward point of view, one that should not be thought of as representative.