https://fedoraproject.org/wiki/Changes/KDEKinoiteAutoUpdateByDefault
This is out since forever and I want to give feedback, but it is not linked here to Discourse and there is no discussion page.
So the feedback:
automatic updates may drain available metered internet plans. They may cause high load when other processes need that CPU power. They may get initiated with low battery, resulting in emergency shutdowns.
If these things are addressed by the Discover mechanism, I look forward to it. If not, look at my implementation or ublue-update