Seems weird that a low-end $ Han's pleather is perfect 45 years later while a high-end $$$$ Han's pleather goes off in 5-7 years.
You have to keep in mind that these materials are coated, treated, dyed, and are synthetic, not a good combination. The process and synthetics chosen today are guaranteed to be vastly different to materials of yesterday. These materials are chosen because they are cost efficient, can be dyed easily and can stand up to the window these companies allow a release to have until it gets remade.
Why go through the hassle of r&d on a genuine leather jacket for a Terminator figure that’s just going to be outdated in a few years, give them a reason to re purchase the same character over and over again. All of these HT Vaders over the years and not a single one made with proper materials.
Corners get cut to maximize the yield, they know a 2.0 Terminator is selling regardless of pleather or not. The cost required to implement a full scale production run of a completely genuine leather Terminator isn’t worth it to them when those numbers don’t even come close to Marvel and Star Wars.
The amount of collectors that only focus on a sculpts likeness is staggering, the truth is most don’t futz, they don’t even think about it, they just swap out the sculpt and accessories and move on to the next release, so giving collectors like that a genuine leather jacket doesn’t do anything for them.