In reply to Miroslav Glavić.

That is not an option for anyone that runs any sort of even small business. Checking hundreds of sites takes a lot of time.

We have set all our sites to automatically update all plugins automatically. I think of the few hundred sites that are auto updating over the past year maybe 1 has had a minor problem.

I FULLY support automatic updates of plugins, themes not so much. So many people don't modify themes correctly to support updating at all. I see this on an almost daily basis.