Or through unencrypted by default backup. It goes on Google drive and there’s no guarantee that it doesn’t go to Meta.

Also, even now, your message could be thousand times encrypted - Google drive backups are not. At least by default. Don’t know anything about iOS, but probably same.

I may be wrong, but does it mean that if someone is able to modify my uefi - they would be able to inject virus in booting image?

Fly Away by Gloryhammer.

I mean, that’s basically what FOSS is about.

CLI > GUI on PC.