I sympathize with you, neone6, but JcR is probably more right than wrong.
Lots of reasons that interest in skinning in general is down. For one, as you well know (you do great work, BTW), it's now very difficult to produce a quality skin absent significant skill with graphics apps and TONS of time. Doing a skin justice is a pixel-by-pixel endeavor and my hat's off to those of you still at it.
For 6 or 7 years I was an enthusiastic WB skinner & spent a fair amount of time doing it as a hobby, mainly for my own use. Producing a nice, quality skin was fairly straightforward, even including animations, and I could have a very usable one from scratch in a week or three, sometimes more depending on how self-critical I was at the time. Even published a few (2006, 2007). Unfortunately, it got to be more like work with Windows7, with a lot more images & details to manage. Maybe it's just a reflection of my natural interest curve over time, but I don't think I'm alone among folks who've been around WC 14-15 years. Many/most of the early artists most skilled at WB skinning (I'll use essorant as just one example) eventually moved on.
Even though IconPackager & IconDeveloper have always been quirky enough to be a bit frustrating, at one time I considered doing some IP packages & spent hours attempting to get the hang of creating icons by studying mormegil's tutorials (which are awesome, BTW). In the event, I found it too complicated and time-intensive for an amateur, part-time skinner like me.
Of course, I've limited myself to WC & SD apps, so there's that, but I think SD have the data & a good understanding of the trends over the past 4-5 years. My guess is that interest/activity peaked with XP & has been waning since the release of Win7.