It is a thing and it still not 100% addressed, Yokozuna is the only one I can safety says is a true compression less system as inside the spiral outer, is the linear strain, so it's slightly thicker than normal but actually work (the spiral outer hold the linear inner)
If my Jagwire/Goodridge stuff fails I might consider something else, but at the moment they've both been fine on 3 bikes for several years and I the bulk of the upgrade to performance/feel/whatever over standard housing is already covered.
What do you mean by splitting under load? Is that a thing?
The goodridge housing seems really tough, been using it for 3-4 years now without any problems...