I can tell you why - internal cable routing, I do agree as hydro would be fantastic on a town bike, a lots less maintenance needed and much easier to notice when it's time to replace the brake pads.
Hmm... Internal hosing, add some fittings to each opening and screw the hoses to the frame. Might be a bit of a bitch if the hose inside breaks a leak at some point.
Hmm... Internal hosing, add some fittings to each opening and screw the hoses to the frame. Might be a bit of a bitch if the hose inside breaks a leak at some point.