The entire boot process, and where it is initiated has changed radically because of security issues and because of hardware changes associated with Apple silicon. The old process simply cannot work any longer and the new process is unfortunately rather baroque. As far as the weekly shut down and restart go, except a few beta related glitches, in the last four of five years, my systems are never rebooted except to install the monthly(?) beta update or once when we had an extended power outage.
