Here's the Tweet by an author of the article that kicked off a Twitter thread where the article was shared:

Taking #Bitcoin Difficulty Adjustment Predictions to the next level with this new analysis. Must read for miners:

https://hashrateindex.com/blog/analyzing-four-years-of-difficulty-adjustment-forecasts

https://twitter.com/ethan_vera/status/1602335559032225792 [Nitter]