Test running 3.8.40 on my Thinkpads X1 carbon 7th and 8th gen I found that running 'live' as well as 'installation' to disk worked flawlessly.
All hardware detected correctly and configured as it should.
- The only thing I noticed was that the installer does not ask for an email address anymore, for bug hunting when installing locally.
I also swapped out SSDs (containing existing Elive) on 3 machines which also went quite well.
The only thing that had to be done was to have 'grub' work nice with the changed UEFI settings.
That can be done through 'chroot' and reinstalling grub with "sudo update-grub" and/or (if coming from Debian Buster) "sudo dpkg-reconfigure grub-efi-amd64".
If 'chroot' is a bit daunting: Then start the existing Elive by downloading and using 'super-grub2-disk' to boot and work from there. That way you'll boot into your habitual GUI, including encrypted partitions.