(There are similar questions to this, but they all are old, like OS X Snow Leopard old. This is for Catalina era.)
I carry my MacBook Pro on me almost always when I go places. I keep it in my backpack. While the threat of it being stolen doesn't loom too badly where I live, and I don't ever let it out of my reach, I still want to make sure that my Mac is useless to a thief if it is stolen.
Currently, I have FileVault 2 full-disk encryption enabled, as well as Find My Mac enabled to the full extent and I have a password set on the EFI to prevent booting from external volumes.
How effective would this be, and is there anything I could do additionally to ensure they can't bypass these measures to use or sell the machine?