“There are only 10 types of people in the world: those who understand binary and those who don’t.”

https://www.exploringbinary.com/there-are-10-types-of-people/

Just having btrfs is not enough, you need to have automatic snapshots (or do them manually) before doing updates and configured grub to allow you to rollback.

Personally, I’m to lazy to configure stuff like that, I rather just pick my Vetroy USB from backpack, boot into live image and just fix it (while learning something/new interesting) than spend time preventing something that might never happen to me :)