https://www.cnet.com/news/confirmed-2018-macbook-pro-keyboard-resists-dust-to-a-point/

It's becoming clearer every day -- the 2018 MacBook Pro "butterfly switch" keyboard was designed to resist dust and debris, and thus avoid the sticky key issue that sometimes plagued its predecessor. 

Why would we say that, when Apple explicitly told us that the keyboard wouldn't include any dust/debris fixes?