I think the author speaks about *.iso, referring to the customary extension of ISO9660 image files. I think the author speaks about the particular Linux distro

I think the author speaks about *.iso, referring to the customary extension of ISO9660 image files. I think the author speaks about the particular Linux distro, and with implications for more Linux distros which use live images on USB sticks* for booting and also* as a removable durable storage. I think that the whole rant should be namespaced under "Live distro images" / "Puppy Linux", like "Why ISO image format should be retired from the live images of Puppy Linux", and not in the general case.