In cases where the number of tabs in TabStrip Control is big and they don't fit the container size I believe a feature where the exceeding tabs should appear in OverflowPopUp, like the way it happens on the ToolBar Widget is going to be highly acceptable. Currently there exists only one workaround in cases like this, which is, make the TabStrip scrollable. I believe this option is totally outdated
Thanks for the suggestion. We'll have it in mind for the next versions of the tabstrip widget, being part of our responsive improvements. Update: After doing some research on the topic, we concluded that scrollable tabstrip option (http://kendoui-feedback.telerik.com/forums/127393-telerik-kendo-ui-feedback/suggestions/2587567-scroll-able-tabstrip) would be much more UX-friendly and can cover better mobile and scenarios with selected tab being outside of the viewable area.