href=https://kubernetes.io/docs/concepts/extend-kubernetes/operator/>operator</a>-based
installation. We introduced the
<strong><a href=/v1.26/docs/setup/install/istioctl/>IstioOperator CRD and two installation modes</a></strong>:</p><ul><li>Human-triggered: use istioctl to apply the settings to the cluster.</li><li>Machine-triggered: use a controller that is continually watching for changes
in that CRD and affecting those in real time.</li></ul><p>In 2020 upgrades will getting easier too. We will add suppo