Why do people use dockers? Isn't the regular taskbar setup superior in every way?

The good old W95 era taskbar works just fine and does what it does but less sexy (macOS does have a very sexy UI...) but with less hassle and less mess.

Sell me on docks and ricing your desktop to the point it looks like macOS. To me the age old winning recipe of the W95 user interface is like the AK, you can't really go much further and expect big improvements, all you get is some small improvements here and there. It's perfect as it is. Yes i know the AR-15 is better in every way but you get my point.