Expected in Ventura 13.1 is a new lightweight system for applying security patches. This article explains how it uses cryptexes, already being used in macOS 13.
cryptex
Three phases of updating, download, preparation and installation, are now fully integrated. They also involve updating Cryptexes, as revealed in the log.
Updated charts of containers and volumes on boot volume groups for Ventura, with details of cryptexes and what they do.
In Monterey, the size of macOS updates has been steadily shrinking. Ventura brings RSRs, which should be small patches to fix security bugs without fuss. Here are the details.
The Eclectic Light Company 