At best, this is ignorance. At worst, it's willful revisionism. It was the iPhone apps that drove setting HCI back almost 2 decades. Hiding functionality behind skeumorphisms, coupling file access to apps, tiny screens, reinventing the accessibility wheel. Both Apple and Microsoft had very well-regarded UI design guidelines that, if followed, made apps that afforded the same metaphors as all the other apps on the system. Then one day the tech industry decided to throw it all away in the name of graphic design and branding, not usability.