Isn't it different because the RSS, Wi-Fi and Shutdown icon have been designed to represent a protocol and/or system?
The iCloud "cloud" icon was designed to represent a product, which implies other products could/should have found something else.
The iCloud "cloud" icon was designed to represent a product, which implies other products could/should have found something else.
Apple's iCloud icon is a cloud icon. Apple's branding strategy is to hijack and monopolize common words like "apple", a warbof conquest against the English language