William Morder composed on 2023-03-13 19:56 (UTC-0700):
Felix has a method for installing by command-line (which he has kindly explained for us in some long-ago post), and I would give that a try,
A script to install TDE on any Debian-based system would indeed be a welcome tool.
It's too simple to need a script. Whatever installation media you choose to boot, simply append to the installer's linu line at boot time
tasks=standard base-installer/install-recommends=false
When your base installation is finished, boot to shell prompt and follow the trivial instructions on the Wiki.
Those two cmdline strings work for *buntu as well, and likely any derivative that uses the debian installer.
For those adverse to upgrades, I haven't done a fresh installation of any variety of debian in probably about 5 years. I have too many installations to count. Upgrading works. Same goes for Fedora, Mageia & openSUSE. I get lots of upgrade practice, using alphas & betas of all as they become available, including Debian Testing continuously.