Where is the new study? They have sources at the bottom but which one is the actual study they talk about?

CTRL+F for "Study" only has the word in the title and in three links in the sources, all of which are from several years ago. I realise it's medium.com, which usually sucks, not real journalism, but how can you make a write-up about a purported new study without mentioning or linking to it once in the article...