Reordering tabs in Photoshop seems a bit inconvenient. To change the order of the tabs you must not move the mouse cursor outside the tab area while holding the left mouse button. If you go outside the tab area, once you go back (while still holding the left mouse button) you can't change the tab order anymore.
It seems a bit inconvenient to focus to keep the cursor in the small tab area to change the order of long tabs.