This kinda goes back to an old thread debating the merits of rigid (turn-buckles) vs. elastic (ratchet straps, Tork-Lifts, etc.) methods of holding the camper down.
I see the elastic hold-downs as being ideal at no time. I get why the Tork-Lifts exist and I think it's a band-aid to the problem of less than strong enough anchoring designs. They're intentionally allowing some compliance in the coupler to keep the anchors from being permanently distorted by an inertial force. In no other highway loading is this found. The closest that I can think of is a flatbed using straps to cinch the load to the truck. While technically those straps are minimally elastic, there are so many of them vs. the load that no inertial force is going to cause them to stretch.
Nylon webbing stretches. It can be made to minimally stretchy or it can be made to be very stretchy, but it all stretches to some degree or other. Then factor in the UV and ozone degradation coupled with fatigue life and I think they're a poor choice for other than emergency or temporary use.
Contrast that with steel, which is not stretchy at anything close to the forces achievable by a camper, does not have a fatigue life and has no idea what UV and ozone are. Seems like the better choice to me.
I safety-wired our front turn-buckles and they have yet to loosen. The rears don't have an easy means to use safety wire so I tried simply using red lock-tite. I've had to re-tension those about once a year and after what ~4 years they're due for more lock-tite being applied. We did have a pin pop-out of one front turn-buckle on the last trip (Mojave Rd.) and I knew something was wrong almost immediately because I could hear the camper making noise that it does not normally make. Stuff loaded next to the pin caused the cotter pin to eject and allow the pin to work it's way out. They now are safety-wired in place and nothing short of a wire cutter is going to pop those "cotter pins" out.
I do not simply drive pavement, we go places that can be a very long ways from the end of pavement. This is ascending "The Wall" on the back way into Lunar Crater:
And this is Coyote Flat over-looking Funnel Lake at just below the treeline: