Debian considering automated upgrades

For the cattle farms and the pets I run and had run, I've seen very few problems with automated updates in the last 7 years, mostly on servers which were co-administated with people without enough experience. Otherwise, cron-apt does it job pretty well, and if you read debian-security-announce, you know what to expect and if there's something that will affect your code or services.
(and you need to remember to set to hold mysql and whatever db server you use, to skip the downtime on that and because that upgrade is one of those you need to watch)

I've tried to do the path of manual update (first on one server of the cluster, then on the rest), but with the quality of debian security updates, it's a waste of time, the automated stuff just works and you can check it in your email in the morning.

Automated release upgrades are a different matter, but the existing tools make that pretty easy to do them manually and seem to work fine (which has been one of the reasons for my dislike of ubuntu, where those were creating a lot more problems)