Hi! :-)
I installed lately at one of my systems, a fresh Devuan installation with KDE (stable ver. Beowulf, x64, fully updated). Then I tried installing the latest TDE (the official way).
At my 1st try (after installing and updating the GPG DEB package), I tried (via Synaptic), installing the tdebase-trinity package, but Synaptic refused and aborted, indicating broken packages and dependencies.
OK. I closed it and opened Konsole -> went root (su -) and I tried apt (apt install tdebase-trinity). This time TDE installed properly, but KDE installation was removed altogether (with the exception of some packages (like SDDM)).
I'm perfectly good with it, and I already (after backing it up), formatted and reinstalled Devuan without any desktop this time and I installed TDE on it.
Just out of curiosity, is it possible to install TDE alongside with KDE? TIA! :-) Giorgos.