I'm not in the Rust community, but it seems like one could have their cake and eat it too, using OOP with DOD storage. * Use a special allocator for objects

I'm not in the Rust community, but it seems like one could have their cake and eat it too, using OOP with DOD storage. * Use a special allocator for objects which reserves a vector slot from your structure-of-arrays. * Objects records are offsets instead of pointers * Object definition includes getter/setters which index the columnar vectors * Store fields declared 'columnar' in a value vector. This could even give flexibility to group columns for locality where needed, and allow ancillary data to be stored in a "leftover" struct.