> - memory usage - how should we handle deallocation - using reference counting with infrequent GC (Python) or by being very careful (C++), using just GC and al

> - memory usage - how should we handle deallocation - using reference counting with infrequent GC (Python) or by being very careful (C++), using just GC and allocating freely (OCaml/Haskell, Java & Nim use "realtime" GC), using uniqueness semantics (Rust, ATS), using memory pools and great care (Objective C) - none of these approaches is perfect and optimal for all situations, and it's very frustrating that they don't really fit together There is also ML Kit's usage of regions - I guess this is roughly the same std::Arena library in Rust.