An earlier version of this work was discussed at https://news.ycombinator.com/item?id=16515552.
Since commenters here are objecting to the article title as misleading, we've replaced it with the subtitle (with s/Havana/Cuba/ to fit in 80 chars).
Since commenters here are objecting to the article title as misleading, we've replaced it with the subtitle (with s/Havana/Cuba/ to fit in 80 chars).