Original sentence: Although the most significant architectural changes were under the surface, the Aqua GUI was the most striking and visible new feature.Mac OS X is a radical departure from previous Macintosh operating systems.Many older Macintosh users decried the interface as "toy-like" and lacking in professional polish, while others hailed the new GUI as a revolutionary Apple innovation.The look was instantly recognizable, though it reflected a trend in design that was already becoming widespread in software applications (such as Kai's Power Tools, or more recently XMMS under Linux and Windows Media Player), and which has since been imitated in Aqua-like skins for other operating systems.The use of soft edges, translucent colors and pinstripes (see: iMac) brought more color and texture to the windows and controls on the Desktop than OS 9's "Platinum" appearance offered, raising a great deal of controversy among users.This combination of GUI and kernel has recently become the most popular-selling Unix environment to date by sheer number of systems shipped
Edited sentence: In addition, interface skins imitating the Aqua look exist for many programs on other operating systems; for example, XMMS under Linux.It has been imitated by many others; there are Aqua lookalikes for other operating systems.Many of Mac OS X's users consider its Aqua GUI to be the most attractive and functional in existence, though many older Macintosh users found the new interface to be "toy-like" and lacking in professional polish.This combination of GUI and kernel has recently become the most popular-selling Unix environment to date by sheer numbers