Even the Mac supports C-a and C-e shortcuts, at least. Often it seems that 'making things simple' really means 'making them like Microsoft Windows'. But then, some useful shortcuts for refugees from the Windows world - like double-clicking a window in the top left to close it, or C-Esc to bring up the start menu - aren't added either.
In general, the principle of least surprise suggests that common keyboard shortcuts should be supported wherever possible. The exception is if they might often be typed by mistake. But Emacs keybindings aren't the kind of thing you can type by mistake.