Uh, a monolithic component design would not "make them more durable". Most of the non-monolithic design is strain relief. The point of things like strain relie

Uh, a monolithic component design would not "make them more durable". Most of the non-monolithic design is strain relief. The point of things like strain relief is often to avoid force being transferred to weak points like electrical contacts (and sometimes to avoid going under the supportable bending radius of the internal wire, though a lot of this is just amazingly flexible these days). Making it a monolithic component makes it all act as a single component. In fact, now rather than straining individual points, you'll strain them all at once! This would not improve anything, it would make it significantly worse. Also, coatings are not magic. If there was such a coating, everyone would use it :)