Isn’t the biggest issue that compiled binaries have segments aligned only to 4kb, and those segments must be on different pages (because they have different memory protections) and can’t be slid relative to each other? I’m not sure how iOS dealt with this (maybe arm64 binaries always had 16kb aligned segments?), but apparently this is an issue on Android and requires all binaries to be recompiled.

https://source.android.com/docs/core/architecture/16kb-page-...