I'm not sure your link disproves this article. The first paragraph just says bootable backups are supported (they are by CCC too), and the rest of the page hasn't been changed in years.

The SuperDuper blog says:

> Note that, as I indicated above, M1 Macs can't readily boot from external drives. There are things you can do, if you have an external Thunderbolt 3 drive (USB-C isn't sufficient), but even that won't work if the internal drive is dead. Unless things change, bootable backups are basically a thing of the past on M1-based Macs. [0]

in a January article, and I haven't seen anything that contradicts it in more recent articles. Mind linking?

(Note that booting from USB-C is now supported on AS Macs, but booting when the internal drive is dead is not)

[0]: https://www.shirtpocket.com/blog/index.php/shadedgrey/commen...