That would surely strengthen the possibility of my thinking being flawed, wouldn't it? That 'everything off to start all at once scenario repeatedly" would surely be less likely in a commercial or semi-commercial situation than a standard domestic one, wouldn't it - despite the diversity calculations being far less 'generous' in those situations?No I think it is not so much flawed as such john but there are times, even in "high usage" where everything is off, therefore sufficiently cooled, to start all at once scenario repeatedly too, so that might factor in also to varying degrees of usage I suspect.
I suspect that is nearly always the case, in relation to most things - you and are are, after all, 'mere mortals', hence by no means omniscientI reckon that someone cleverer than us might be able to inform us better on this topic.
Kind Regards, John