Re: "C-x 5 5" vs "C-x 4 1" inconsistency

[Juri Linkov]

>> All current keybindings already have the same final keys, e.g.
>>
>> C-x 4 4 C-h i   - opens Info in a new window
>> C-x 5 5 C-h i   - opens Info in a new frame
>>
>> Their final keys are the same.
>
> That's not what I meant, and you know it.

What I definitely know that here is some
misunderstanding that needs clarification.
The Info node (info "(emacs) Keys") says:

  ‘C-x’ and ‘C-x 4’ are prefix keys.

The same way 'C-x 4 4' is a prefix key as well.

There is no reason to change this prefix key
to something more hard to type such as 'C-x 4 x y z ...'