The human brain does remember a remarkable amount of information. I, too, sometimes have to "go through the motions" to remember things such as telephone numbers. However, I do not agree with the attitude that something as personal as the actual keyboard interaction with an application, especially one with which a customer interacts for most of each work day, should not be as flexible and friendly for the user as possible. I especially disagree with a "one size fits all mentality" for nearly anything. I cannot imagine it would be too difficult to at minimum allow the user to save the keyboard mappings as "sets" to allow the user to easily and quickly change between them. I am sure the community would soon provide the default sets to match the popular editors (past and present). I, for one, do not appreciate being forced to learn new keyboard mappings for different applications that accomplish the same thing. Also, some computers are shared among colleagues or family members. I doubt you will be able to get them all to agree to the same keyboard mapping.
Ultimately, the authors of UltraEdit are, and should be, free to design it to work anyway they wish. I, too, am free not to become a customer.