Comment by WorldMaker

This change suggests that passing pointers is "generally safe", the unsafe boundaries are when they are de-referenced. It sounds like the Marshal methods are probably going to get a lot of surprising new safety warnings, but not all of them just because of the use of IntPtr. This change does open more opportunities to switch IntPtr to more explicit type-safe options like void* or byte* as the new compiler no longer needs unsafe {} blocks around just passing around pointers from one function to another.