But it is clearly stated in the output that it holds back packages.

When a kernel update requires a change in dependencies, something Proxmox kernels do frequently, apt just quietly “keeps back” the package. It doesn’t fail, it doesn’t break the system, and it doesn’t trigger a rollback. It just waits for me to notice.

This should save a click for hopefully everyone.

Yes obviously, if you do not update the packages then they do not get updated.

If you do not read the output of a command then you will not notuce that.