> Maybe other distros can work around those limitations.
I am afraid that you have this rather backwards. This is closer to Canonical playing catch-up.
The first such project came out from Lennart Poettering of systemd fame:
https://0pointer.net/blog/brave-new-trusted-boot-world.html
Which I wrote about here:
https://www.theregister.com/2022/10/26/tightening_linux_boot...
And which started shipping in systemd 253, which I wrote about here:
https://www.theregister.com/2023/02/17/systemd_253/
SUSE has its own version as well.
https://www.theregister.com/2022/10/05/suse_alp_v001/
It may be that UKI is an attempt to leapfrog SUSE ALP.
> Maybe other distros can work around those limitations.
I am afraid that you have this rather backwards. This is closer to Canonical playing catch-up.
The first such project came out from Lennart Poettering of systemd fame:
https://0pointer.net/blog/brave-new-trusted-boot-world.html
Which I wrote about here:
https://www.theregister.com/2022/10/26/tightening_linux_boot...
And which started shipping in systemd 253, which I wrote about here:
https://www.theregister.com/2023/02/17/systemd_253/
SUSE has its own version as well.
https://www.theregister.com/2022/10/05/suse_alp_v001/
It may be that UKI is an attempt to leapfrog SUSE ALP.