In reply to Alex Sirota.

If an automatic update screws up hundreds or even thousands of your clients sites………..if you are there doing the updates, you can start right away to fix the issue(s).
That is what your clients pay you to (the ones that pay for maintenance), for YOU to maintain them, they don’t pay WordPress to update itself. This is a general you, not you specifically.

I have had to update hundreds of sites at once. It took me a while but I did it in under 24 hours.

My clients pay ME to update not WordPress.

I think it’s lazy to charge clients for maintenance and then let the automatic updates do it for you.