Not a reasonable comparison. There is no functional reason to shut down iPhones, but dual booting with Windows, I would say, is a fairly ‘normal’ thing to do on iMacs. Whatever ‘normal’ means!Well I wouldn't consider a dual booting user a "normie". I was referring to the fact that a Joe average user probably never shuts down his Mac in the same way he never shuts down his iPhone, thus never has the chance to be bothered by the chime.
Either way, the chime is important indicator of boot confirmation for dual booters, taking it out is a negative in that case.
The chime should be at least an option.