Google uses FUSE for shared storage, not internal app storage. Apps are supposed to keep most of their data in internal storage since shared storage breaks the

Google uses FUSE for shared storage, not internal app storage. Apps are supposed to keep most of their data in internal storage since shared storage breaks the whole isolated security model. Content providers and other intents are supposed to be preferred for sharing data. It might a good thing that doing things properly is faster... and throwing everything into the kernel means more and more attack surface. Google maintain the kernel implementation (sdcardfs) too... they choose to use the FUSE implementation for good reasons. Of course, most other vendors only care about benchmarks, not things like robustness / security.