I am reading the post again. It does appear the author is not fully aware what DFU is supposed to do. They are talking about "storage devices" in that context, which is a total misread--their interpretation of DFU seems to be something close to "default boot device."
The DFU port is definitely not the singular one on the right side of the device. The documentation debate is about which port on the left side of the device (closer or farther from MagSafe.)
Genuinely curious — did you use an LLM to write this post; or do you have this tone naturally?
> They are talking about "storage devices" in that context, which is a total misread
What misread are you talking about? I'm talking about storage devices because the documentation says you can't update macOS on an external storage device while it's connected to the DFU port.
> their interpretation of DFU seems to be something close to "default boot device."
No, that's not my interpretation. I have no idea where you're getting that from the blog post.