In reply to Johnny.

During the WordPress 4.7 development cycle, Rand-Hendriksen said he was involved in several conversations where participants assumed the use of features without any data to back up their opinions. He contends that WordPress contributors do not have the necessary data to know how users are interacting with the application and its features.

“The general argument was that based on the 80/20 rule, certain features should be added while others should be removed,” Rand-Hendriksen said. “I kept brining up the well known fact we don’t have a clue what features 80%, or even 20%, of WordPress users actually use so any claim of validity in the 80/20 rule is guesswork at best.”

Lack of proper data and assumptions based on confirmation bias in core... Seems they aren't really analyzing what's needed, just going by hunch and responding to 'market noise'...