AppStream Re: Depends/Recommends from libraries
appstream itself is installed on ~60% of sid/stretch desktops , but
isenkram on only ~5% (and most of those are the -cli version).
When beignet-opencl-icd added AppStream metadata (black line in ),
there was no noticeable increase in its installs. As it's for popular
hardware (~33% of systems ) but a sufficiently behind-the-scenes
feature that few users manually install it, this is a fairly sensitive
test: <10% of new (including newly upgraded) sid/stretch desktop
installations with the hardware installed it.
Hence, either most users don't see AppStream suggestions, or most users
don't want GPU compute when offered the option. (beignet-opencl-icd's
AppStream summary/description are "OpenCL (GPU compute) driver for Intel
GPUs"/"This allows using Intel integrated GPUs for general computation,
speeding up some applications." At least libreoffice-calc and probably
ffmpeg can take advantage of it, but it's very possible that typical use
of these is either on too little data to notice the difference, or has a
better option (libva/libvdpau).)
libvpx4 (video decoding, dependency of firefox and chromium) and
libllvm3.9 (compiler library, dependency of libgl1-mesa-dri) were chosen
as approximations of "all stretch/sid desktops", as they have changed
soname since jessie.
 from recent bug reports: