agglutinating mode beats append-next-kill

[jidanni]

Gentlemen, today we shall consider

  If you want to append the killed line to the last killed text,
  use C-M-w before C-k.

Not good enough.
$ cat exhibit_A
1
2
3
4
5
6
7
8
9

Now try to gather up lines 3, 6, and 9 into the same kill buffer.
Notice all the effort needed,

C-n C-n C-k C-n C-n <escape> C-w C-k C-n C-n <escape> C-w C-k
or for younger users,
C-n C-n C-k C-n C-n C-M-w C-k C-n C-n C-M-w C-k

Allow me to propose "agglutinating mode" wherein all your kills get
glued together just like you managed to type C-M-w before each C-k.

With agglutinating mode activated, one need to merely type

C-n C-n C-k C-n C-n C-k C-n C-n C-k

Indeed, agglutinating mode puts the pleasure back into editing. No
more crossword puzzles on the keyboard. So some whippersnapper
please implement it. I am just the ideas department.

If perhaps agglutinating mode has indeed been already implemented, and
I am merely in the dark, then in the docs please mention it wherever
append-next-kill is mentioned.