That's interesting to hear, thanks! My rant was only really aimed at shared mutable memory; passing a piece of it around with one owner at a time is totally fi

That's interesting to hear, thanks! My rant was only really aimed at shared mutable memory; passing a piece of it around with one owner at a time is totally fine. One writer, multiple readers has its uses too. I am a fan of persistent data structures and I think that as we keep slapping on cores they're going to be more appealing for general purpose computing, but they're certainly not one size fits all, and the performance tax is substantial.