The feature was not hidden because it had no benefits, but rather it has very high costs. A lot can and does go wrong with hibernate, and for many people, it just never works. It's worth exploring whether we can get by without the feature.
In the meantime, the GUI is hidden, but the feature is not removed. You can tweak:
/var/lib/polkit-1/localauthority/10-vendor.d/com.ubuntu.desktop.pkla
To return the GUI for hibernating if it's very important to you.
The feature was not hidden because it had no benefits, but rather it has very high costs. A lot can and does go wrong with hibernate, and for many people, it just never works. It's worth exploring whether we can get by without the feature.
In the meantime, the GUI is hidden, but the feature is not removed. You can tweak: polkit- 1/localauthorit y/10-vendor. d/com.ubuntu. desktop. pkla
/var/lib/
To return the GUI for hibernating if it's very important to you.