I have my taskbar as two rows instead of one so make it more readable what's behind it. The taskbar has four on the top and say two on the bottom, the issue happens too often that the icons shift around.
task1 task2 task3 task4
task5 task6
When try to click task 5 above, it would become
task1 task2 task3 task4 task5
task6
Then try clicking on task5 above, it would become
task1 task2 task3 task4
task5 task6
Now, how annoying is that? It's like trying to catch the bouncing red ball..... But when you gave the idea of
lock taskbar, it does not bounce around, but yet, i must always click
lock taskbar to avoid the bouncing each time ---- not good way to use Windows