There's always going to be die-hard devotees of skinning ... those with a critical eye on design and human interface, but by and large the hey-day is now a time in history...
And let us all be thankful to those die-hard skinners who are still plying their trade. Sadly, the hey-day for skinning is a time since gone, but there are a few reasons for that, and not because we've lost interest.
Some skinners rode off into the sunset to pursue other aspects of their lives, but thankfully their skins are still here in the libraries.
Others sadly passed, but thankfully they left us great legacies and live on in the WC libraries.
Another reason skinning took a big hit is because Microsoft messed with Windows and made it more difficult to customise. However, that is just one of the modern reasons skinning took the hit. Damned mobile devices can be attributed for a large chunk of it.
My sister does just about all of her computing on her phone these days, as do many others I know, and regular PCs sit idle. In fact, my nephew is friends with a bloke who manages the resale section at his local refuse tip, and he reckons that working PCs get dumped there every day but he can't give them away, such is the demand... or should I say lack of it for used PCs.
I'm the complete opposite, however. My phone and tablets sit idle and my PC is running. Quite frankly, I can't see how anybody would prefer to do their computing on a piddly little phone screen: make a call take a call, but I have no fascination to sit there twiddling my thumbs on a piddly phone with eff all screen real estate.
Yup, fechen mobile phones oughta be banned.
Anyhow, I used to make icons, but my reason for stopping making them is arthritis, and to some extent vertigo. I found that I couldn't sit at the PC for long periods making them, and getting up and coming back to them didn't work for me, so I had to stop. It's a pity because I enjoyed making them, but I can't force the body what it doesn't want to do, especially now that my mouse hand is buggered up with arthritis.