I've previously used the Add-on Tab Wheel Scroll. This has the useful option of disabling wrap. Hence, if I wanted to get to the last tab, I could hover over the tabs (in Tree Style Tab), and scroll down to the end. Tab Tree doesn't have the option to disable wrap. Instead, indiscriminate scrolling wraps the selected tab back to the top tabs.
I've previously used the Add-on Tab Wheel Scroll. This has the useful option of disabling wrap. Hence, if I wanted to get to the last tab, I could hover over the tabs (in Tree Style Tab), and scroll down to the end. Tab Tree doesn't have the option to disable wrap. Instead, indiscriminate scrolling wraps the selected tab back to the top tabs.