Quoting Cyril Brulebois (kibi@debian.org):
Hi Niels,
Niels Thykier <niels@thykier.net> (2015-06-01):
> There is an existing experimental patch series for debhelper to have it
> automatically create "ddebs"[1][2]. Currently, it /also/ happens for
> udebs, which leads me to:
>
> * Is it useful for you to have ddebs generated from udebs?
I don't think so.
The same stands for me.
Still, I haven't followed discussions about ddebs very closely : my
understanding of them is probably the same than Niels' knowledge of
udebs..:-). Still, I understand the basic concepts (providing debug
symobols and debug "stuff" in dedicated packages in a similar way to
what Ubuntu is, IIRC, doing in Launchpad).
And with that understanding, I don't really see how it could be
possible to use these in the D-I context.