The simple era, before the 2013 was the Modern Era, the logos and designs, web and program designs are modern, after 2013, all the designs was simple, one example:
Before Simple Era: The logo has a modern appereance, with shadows and bright
Simple Era: The logo is more simple, does not have shadow or bright
And this is only one of the examples, other thing of the simple era, the only thing that is not simple is: the RAM consuming, and the weight, one program before the simple era can consum 100MB of Ram and 500 MB of Hard Drive, after the simple era one program can consum 1GB of Ram and 3GB of Space in Hard Drive!
This era is a shit, nothing modern, Skype shit and RAM consuming, Windows XP is now treating it like trash, Chrome does not have XP support, and other many programs, and XP is used by at least more than a million of people.