it is also available on Windows and Android
Perhaps, but I've got a few computers all running different Linux distributions (as is common amongst Linux geeks), and as long as they can't sync, Ubuntu One will have to wait.
@Lennart: "If you list this notifier spec, then I can list you the sound theming/naming specs which KDE has shown no interest in."
that's an incorrect comparison.
if we (KDE) had offered a bunch of critique on the sound theme spec, had someone come to us with an implementation in Qt and then still gone off and done our own thing instead, then it would be an adequate comparison. but that isn't what happened, is it?
we (KDE) simply haven't gotten around to implementing the sound theming spec. why? as you note, it's not a high priority for us. but i guarantee you that if someone stepped up to do some work on the event sounds infra in kdelibs, stop #1 would be that naming spec.
also, this is not an odd "oops, we just didn't get around to it" event on the part of GNOME: how's that job D-Bus implementation in GNOME 3 coming? you know, the one that needlessly duplicates the one KDE implements, which we actually designed with thought of cross-project use including getting some feedback from non-KDE devs? or how about the screensaver D-Bus API which we implemented specifically with collaboration with GNOME devs at SUSE, only later to have GNOME not implement it and then complain to us that it used the org.freedesktop namespace? or how about how GNOME devs specifically blocked the formation of a common git repository for fd.o specs, and then when there was finally agreement (after an in-person meeting) insist on implementing it themselves, ignoring that repo had already been started but by people with @kde.org email addresses, and then after taking months to eventually duplicate that effort not implement the most critical part of it: the metadata?
in contrast, we could see how KDE implemented support for the visual notificatons D-Bus protocol as implemented in GNOME, even though it has evident limitations and is a 100% subset of something we already have in the form of KNotify
what GNOME needs is not more apologists making excuses for poor behavior but people who will stand up and take ownership of their actions.
If I have not seen so far it is because I stood in giant's footsteps.