As far as I can tell, Apache Arrow is not very mutable. It basically has to reallocate the universe. I don't need large data between processes. I need short-

As far as I can tell, Apache Arrow is not very mutable. It basically has to reallocate the universe. I don't need large data between processes. I need short-lived medium data ... large enough and short-lived enough to make serialization painful but mutable enough to make "stores" kind of annoying.