This paper is sort of a successor to https://sing.stanford.edu/site/publications/levy-plos15-tock... , a previous paper on this topic. After publication, Amit solved many of the issues presented there. It was previously discussed on HN https://news.ycombinator.com/item?id=14105884
Some more context https://www.reddit.com/r/rust/comments/655816/ownership_is_t...
Amit left even more context just now on /r/rust: https://www.reddit.com/r/rust/comments/75xwib/the_case_for_w...