You cannot just get "cinematic" frames by using every fifth frame. The shutter speed at 120 fps is much higher than shooting film at 24 fps hence a lot less motion blur that is part of the "cinematic look".
Maybe you haven't looked very often but nice code is out there for quite some time. Take a look at anything related to the GNOME stack (GLib, GTK+, all the applications) or the Linux kernel for example. And quite frankly, I stumble upon badly written Python way more often than C.
It's been part of email and newsgroup etiquette for ages now. Same goes for the quote blocks. So, why change something that is working for a lot of people in different domains?