It has been '0' days since I found an incompatibility in Ubuntu 26.04 Rust coreutils: 'stty tabs'. Also, the uutils stty manpage is absolutely ass in 26.04.

This is my face that Ubuntu 26.04's packaging of util-linux has omitted /usr/bin/mesg. What? Why?

(well technically this is the slightly pre-beta 26.04 packages...)

As incredible as it seems, it appears that the Ubuntu 26.04 daily builds, very shortly before the beta release, cannot boot from a mirrored RAID root disk setup (either UEFI or MBR booting).

This is my face, again.

@cks I thought you were planning on migrating away from Ubuntu in any case?
@fazalmajid We had sort of hoped not now and that 26.04 would be perfectly okay. We'd have to completely redo much of our installer setup to get Debian going and that's a much bigger project than spinning another variation on Ubuntu LTS. (Plus inevitable operational differences, plus things we can carry forward from Ubuntu but not Debian since we don't have saved versions of them, plus ...)
@cks I understand the pain. I myself run Alpine on my servers and CachyOS on my laptops/desktops, keeping Ubuntu only on the machines with Nvidia GPUs I need CUDA on.