Is there any particular reason `scroll-other-window' is written in C and not in ELisp?

[Marcin Borkowski]

The reason I'm asking is that C-M-v (and C-M-S-v, for that matter) do
the wrong thing if the other window shows a pdf file using pdf-tools.
If those commands were written in Elisp, I could not only advise them
(which I can, and probably will), but also propose a patch or
something.

Best,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University