With other control panels, you cram as many clients as you can on one hardware to save on licensing, as each hardware will bring a cost of CP + security software + backup software + you name it, so using other CPs, you would not have many servers to update, and most of the time they update themselves (Cpanel)
Enhance is a different beast taking over the many servers, and a tool to update all the servers by pressing one button is a must.
I know suggesting external tools is easier, but then go against the purpose of keeping most things under one umbrella. 🙂