Originally Posted by thommy

that was one of the rare core updates google announced BEFORE they made it.

looks like linkpolularity has lost again weight in this update.
pagespeed and mobile friendly got a bigger weight and sites with a clear structure hierarchy
won a lot.

google always explains what they want but they wait til enough sites are compliant with their guidelines. as soon there are enough they bring this step by step into the game by changing the weight of the different aspects.

but real user experience is already in place and it will replace all other factors within the next 3 or 4 years.