We've already decided that updates cannot be done safely without at least one reboot, so let's not bother with requests to remove that.
That may be an intentional design decision, but as a result I've simply stopped installing updates.
Yes, the kernel has traditionally required a reboot, as have power failures and hardware upgrades. But it seems odd that a reboot is required for, eg, a GIMP update. (or is that not the case? It has seemed like everything coming in through Software Update requires reboots these days. That is my impression, and the impression of many others, and it may be incorrect.)
Monty