In some applications like Visual Studio it might be required to have the possibility to set a "multiple-combination" key like CTRL+K+C to toggle the code comment and CTRL+K+U to toggle the comment away. This possibility is missing and would really add a great benefit plus a great value to the whole system as it will make it basically adaptable to anything. For my work I've implemented already similar concept in one application basically waiting few milliseconds for eventual second keystroke before applying the command so to be able to catch both K and C or K and U keys applied to the CTRL keep pressed.