he mentions inverter freezers at the end so it must have been updated more recently

I don't think so? The PDF includes "today (2009)", and also "started in 2004". It's been featured on HN before.. as far back as 2009. Unfortunately the archives first caught the (same) text in 2021, so that's not helpful.

rcfox's criticism from 2009 still stands (6 points, 2 comments) https://news.ycombinator.com/item?id=865991