I'm managing tens of WordPress websites, own and client, live and staging. Of course wherever I can I have all the auto updates enabled.

Still, WordPresses can be quite noisy with their email notifications:

"Some plugins have failed to update"
"WordPress was updated"
etc.

I got tired of that so I made a small plugin that just silences most of them ( only keeps the Recovery Mode emails ) - of course controllable with filters, and published to the repo.

I assume that most of the people in similar situation already have a solution for that. But if someone doesn't - there you go.