I think it is kinda cliff dependent. There are a lot of reasons. Reason 1, cable draws are generally galvanized, if you go to world wall you can see how they rust pretty bad, with chain we can choose plated, painted, galvanized or stainless. Reason 2, the cable draws were pretty much unavailable last year, and if they were they were, it was $20 a piece. Reason3, the cable draws also generally come with a plated quick link as well so you have to spend another $5.00 to replace it with stainless. Reason 4, I think chain is easier to grab. Reason 5, chain can be custom length. Reason 6, the weight of the metal doesn’t result in as many spinners as the cable draws.
At world wall the cable draws make sense since world wall isn’t actually that steep and the rock is extremely brittle. If someone were to permadraw canopy or the woods I would prefer cable. At crag of the 20s I think the permas would have to be specific to each route. I think when we did the actual cave it is mostly cable but it probably should have been stainless chain.
We still need to buy more permadraws for helms but my wife isn’t happy that I bought 400 bolts last year lol.