You neglect to consider that this 'rock-solid stability' comes, by most accounts, from the BSD/UNIX underbelly of Mac OS X--combined with an amazingly high-level, secure, and both extensive and extensible programming architecture called Cocoa, all of this imported from Apple's acquisition of NeXT.
Much else of what exists in OS X is written in Carbon, which hasn't nearly the security, yadda yadda yadda, of the NeXT stuff, but was coughed up ( in a magical hairball, no less 😉 ) to allow legacy code to be ported over to OS X with less fuss. Steve Jobs, as a show of good faith to old-school programmers, had things like iTunes and the Finder (which already had a pre-existing Cocoa version)--and portions of the underlying operating system--ported into this Carbon language...
File management is handled largely with Carbon operations, on some level. Shouldn't we be a bit more wary of claiming that restarts due to garbage are unnecessary--*yet*--until we've ditched Carbon file-handling and Apple's aging, case-insensitive HFS+ (which has been around since System 8.1) and either invented some new file system or latched onto another existing one, such as the UFS that Apple also offers in its installers?
