Stefan Krusche wrote:

> Yes, I had a Motorola V8 which was also based on Qt3. But do you know of
> any device which currently builds their system on Qt3?

I staid with KDE4 aka TDE not because of QT3, but because the code is
stable.
From my experience QT3 lacks a lot of modern functionality and compared to
QT5 it is much harder to do things, however after cleaning basic bugs from
TDE, I would not replace it for anything else. It is light and stable and
provides (mostly) all I need.
I hope the rest of the community shares the same opinion.
As of other systems based on QT3 we discussed recently the Q4OS, but I am
not aware who is using what.

regards