How do the EU's new EES passport checks affect the 90-day rule?

As European travellers prepare for the introduction of enhanced passport checks known as the Entry & Exit System (EES), many readers have asked us what this means for the '90-day rule' for non-EU citizens.

How do the EU's new EES passport checks affect the 90-day rule?
As European travellers prepare for the introduction of enhanced passport checks known as the Entry & Exit System (EES), many readers have asked us what this means for the '90-day rule' for non-EU citizens.