I do receive Chrome updates and although I know it is beneficial and I should embrace it, I would rather Chrome notify me in advance - simply because then I am not left wondering why so much memory/bandwidth hogging is going on during this period for no (initial) apparent reason.

In two minds about this change: am sure I will come round to it though and love it, going by what the introduction of Dashboard plugin installation/updates has done for everyone.

Will certainly be checking out the config on the Codex as I think it would be helpful if multisite admins, at least, have more fine-grain control over even minor/security updates.