I once had, not a proper Editor Keyboard, but a Cubase overlay for a regular keyboard. I found it less useful than anticipated because it was based on the default Key Command assignments. That meant that a large number of keys were labeled for Commands I’d never use; and none of my custom Assignments (which clearly would be used) were labeled. Also as new versions of Cubase came along, some of the KCs changed. Ultimately it didn’t get me to use KCs more.
A problem with KCs is that it is easy to remember the ones you use all the time. But the ones that are needed once every week or two are hard to remember. And often it is easier in the moment to use the mouse & menu rather than taking the time relearn the Key Command. I used to mitigate this somewhat by keeping a table of KCs in Excel, doing a screen capture of the table and using that image as my desktop, where it could be easily consulted.
But all that went away when I got Metagrid, which for me is the best solution for consistently using Key Commands.
Also those dedicated Keyboards are pretty pricey, while the thoroughly adequate Logitech I’m typing this with cost about $11 US - cheap enough to not care if you spill a coffee (or adult beverage) on it.