almost no headliner or automotive upholstery is done in real suede... the high end jobs are pretty much all done with alcantara, which is a premium man made material that is better than any natural suede in looks performance & durability... real suede would stand up to use like crap compared to alcantara & pretty much all high end luxury & exotics will have alcantara, not real suede.
it's a bit expensive but not ridiculously so... for example doing a head liner in a less expensive suede may be ~$90 in materials, where to do the same job in real deal alcantara may wind up being a little over $400 in materials... on a headliner I guess the durability & performance of alcantara isn't highly necessary as this is an area that rarely see's much wear at all, but if you were doing something like seats or other upholstery in a car then the price difference is more well worth it for the durability, water & stain resistance & wear resistance that is way better than any other man made synthetic suede... it's also much tougher material as far as rip & tear resistance & holds stitching & seems very well, where some other synthetic suede can be a lot more "paper like" in comparison.