External Flash Drive Question, Prerequisites

[one-rgb]

I successfully implemented the bypass-mdm script about 5 months ago and it's been awesome - great job @assafdori . I'm running M1 silicon, Sequoia 15.3.1. However, I'm confused about doing updates and whether it is advised to continue using a bootable flash for updates. I have my Sequoia 15.0 bootable flash drive - but if i try to use it for an update, I see a message that reads "you cannot boot from an older OS." So I end up downloading the Sequoia OS updates from the App Store and installing them as a logged-in user. My 2 questions are: should I be trying to install the incremental OS updates from a flash drive? is it bad to do the incremental updates from the App Store? thanks.