As opposed to Mac OS X, where many apps can't agree on which key binding to use for switching tabs to the left or right? Alt+Cmd+Left/Right in TextMate and Fire

As opposed to Mac OS X, where many apps can't agree on which key binding to use for switching tabs to the left or right? Alt+Cmd+Left/Right in TextMate and Firefox, Alt+Left/Right in Adium and iTerm, Apple's own apps use Alt+[/]. Or Windows where there are a gazillion of widget sets that only happen to look like each other? MFC, WinForms, VCL, Fox, FLTK, Tk, WTL, etc. not to mention that almost every commercial app thinks it's cool to use custom controls that don't look or behave like the rest of the system. And these are supposed to be serious desktop OSes?