It's great to see Highcharts v11.4.1 has been upgraded; it's a much-needed update that improves accessibility and adds visual polish to charts from the start.
Redesigned tooltips, enhanced contrast, updated typography, and column/bar styling all contribute to the charts it improved appearance and feel, which is crucial for creating contemporary, intuitive dashboards. The new disabled series visuals are much more understandable for end users, and the border-radius on bars and columns is a subtle but welcome design improvement.
Additionally, I appreciate you alerting me to the possible visual effects on custom charts. This transparency aids developers in making appropriate plans for the upgrade.