it depends on if the mother wants to keep it or not

my step-uncle has downs and my step dad said that his mum would've chose to abort had she have known, obviously she loves him and he turns 40 later this month, but shes had so much stress and worry about him and his future etc, kinda like having a child that never quite grows up

Not sure how it's "eradicated" there will still be downs syndrome children. They're just aborting them based on probabilities.

The tests are so good now that they can identify the issue every time and give the parents the choice earlier which is good news and progress.

They can identify the "chance" but most conditions like downs can't be 100% predicted how severe they will be, or even affect the child at all.

So not much progress at all.