Dependable means less failure prone. Can I depend on this thing to work when I need it to. Mags fail all the time. Magnetos are probably one of the least dependable ignition types available. We just tolerate it because that's how it's always been, and replacement mags are (usually) easy to find.
The various fuel delivery systems are all pretty solid. Carb, mechanical fuel injection or EFI all seem to be pretty solid. EFI is more complex since they're now electrically dependent and require a much more failure tolerant electrical system.