Why ISO was retired

Some time ago I stopped releasing EasyOS as an ISO file, from then onward as a drive image file only. This has been contentious, and I receive emails from people lamenting the demise of the ISO. So, I should post some thoughts why I made this decision. Not an exhaustive rationale, just some thoughts while I think of them right now...

The ISO9660 file format is very old, going right back to 1988, and has since then had enhancements bolted on, see the Wikipedia ISO9660 page. In addition, there is the hybrid ISO", enabling booting from a USB-stick, and on top of that enhancements to enable booting from either or both legacy-BIOS and UEFI firmware computers, see here.

I think I agree. ISO files have become a bit of a headache lately, and I'd much rather just use a straightforward image I can dd to a USB drive.