New guidelines from the European Society of Cardiology (ESC) recommend that »chronic coronary syndrome« (CCS) replaces the previously used term »stable coronary artery disease«. The background for this recommendation is that the coronary artery atherosclerosis process is a dynamic process that, although stable under long periods, may become unstable and result in an acute coronary syndrome (ACS). In this commentary, the Working Group on Coronary Artery Disease of the Swedish Society of Cardiology points out what is new in the 2019 CCS guidelines.