What a strange article. What's called an 'ISO' is, these days, pretty much a thin wrapper for an UDF file system -- you can definitely use it differently as well, but I'm pretty sure nobody has created, say, an ISO9660 plus Joliet plus El Torito image in the past decade or so.

And, no, UDF isn't great either, but I wouldn't say it "has to die": it's a pretty convenient distribution format due to being widely supported, as it's really simple to implement.

So, this mostly seems to be a rant against live-CD-style Linux distros, since those are hard on maintainers (plus: toxic community multiplier)? On the one hand that might be true, on the other hand, the 'hey, here is how you get an ext4 or whatever filesystem in RAM' tooling around that is so mature and convenient that it's hard to see why, and I can't distill any real arguments from this...