I still think it's a very pragmatic way to fight real estate speculation. But my impression is that Amsterdam doesn't have a big problem with buildings sitting empty, so if squatting is illegal again, I guess they've found a different way to prevent it? I have no idea what that is, though.
Houses still get squated, but less often and the squatters have to leave much quicker.
A quick translation of a Dutch article explaining how squatting is still possible:
>Today, squatting is illegal. This means that if a building is squatted and the owner makes a declaration, a procedure is started by the Public Prosecution Service that can result in evacuation. The squatters must be informed in time, so that they have the opportunity to institute summary proceedings. That does not mean that the squatters can just be removed from a building once they live there. That is only possible if they seriously misbehave, break house peace, get in the way of the activities of a company, or are at risk because the building is in poor condition.