My experience. Two days ago, I upgraded KUbuntu from 23.10 to 24.04 LTS on my R&D box. It just worked. After a couple of days of using it, nothing found that was a problem or non-functional. As usual, upgrades now are just ho-hum, works the same as previous version. Eventually I'll probably run into something under the hood that is different, but the computer drives the same, looks the same ... I like it that way, actually -- no surprises!

I'll leave my other laptops/desktops/server running KUbuntu 22.04 LTS in the meantime. Let the dust settle on 24.04.

As a quick follow up, still no fallout from the upgrade. Usually by now I'd have something that needs sorting out, but not this time.

Ran into my first program that wouldn't run.

Balena Etcher application (for flashing .img on SSDs) would not start due to a sandbox issue. Found the solution:

./balenaEtcher-1.7.9-x64.AppImage --no-sandbox --disable-gpu-sandbox

Which works, so off and running.

Balena etcher is only meant as a tool for flassh files with the .iso extension however, you can always use the dd command visa-via the terminal emulator of your choice.

No not .iso but .img .... It is what I've used forever (well a long time) to flash SD cards (or external SSD drives) for the Raspberry PIs as that is the format that the PI OS distro uses. Works great! Example: "2024-03-15-raspios-bookworm-arm64.img"

That said, being curious, I searched for ".img vs .iso" and found:
"There is no difference in the structure of ISO and IMG formats if the IMG file is uncompressed. It is possible for an IMG format file to be renamed with the ISO file extension and then opened in software that only recognizes the ISO file format. This is an effective way of accessing disc information in programs that do not handle the IMG format."