On a long enough timeline your prediction will come true about everything in life. We are born. We die. The world will end eventually as well.
My response at the time (2023) was that we had no plans to remove the skin. At that time we didn't. I had no plans to remove the skin when I started the upgrade.
After the upgrade when I saw how many errors the old skin had and the amount of work I'd have to do to make it work with the new software, I decided the effort wasn't worth it.
It takes a lot of work to fix all the CSS and HTML bugs on a skin when you upgrade the software. Now, multiply that for every skin we support and every upgrade we do, and every add-on and modification we add... it's a lot of work. And when only a handful of people use it, it's hard to justify the time expense.