Hi Barry! I was referring to my first and only disk brake bike. The rim brakes on my other bikes still perform just fine on their factory blocks, so no issues there.
Back to Geepig's point, here's what the standard coil housings look like at the frame hinge:
The more sharply looped of the two is the rear brake housing. My hand is there for reference, and I've got tiny hands! And that does not look to me like the kind of bend that a compressionless housing - or a hydraulic line, for that matter - could handle and stay intact for long.