I doubt that sudden shutdowns are 'on' by default in this beta.
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Because Apple has been moving away from prefixing everything with an 'i' for a while now. iCal became Calendar, iTunes (on iOS) became Music, iChat (on Macs) became Messages, iPhoto became Photos. Other 'i' apps died of natural causes (iDVD, iWeb, iSync). New hardware and software 'categories' were launched without the 'i' prefix (Garageband, Apple Watch, HomePod).
Why would they do that though?