Needless to say the themes would have to be extended to accommodate the features of the relevant toolkits like GTK3 complex window titles and KDE's optional always-on-top and always-on-bottom buttons (I actually want every stacking window manager to have these two, I use both of them a lot).
And I would also want these for Windows 10 (and 11 obviously), not just Linux. Themes for some actual apps (e.g. Firefox) also needed.
I wonder if there already is enough of aging millennials appreciating retro GUIs to form a market.
[1] https://docs.oracle.com/cd/E37069_01/html/E37073/figures/ide...
If you're used to the other side of the fence, CDE [0][1] is 28 years old and perfectly usable on modern systems, not as a theme or recreation, but simply as the same software that once dominated the Unix desktop scene. Sometimes I enjoy running it when I get fed up with the "modern" world and just want to work on a system that's nigh-indistinguishable from decades ago.
[0] https://en.wikipedia.org/wiki/Common_Desktop_Environment
Not for icons but Chicago 95 makes a good approximation.
Tried it out on an old MacBook and the look was great, but then I got bogged down in the standard get-trackpad-and-wifi-working.
Not sure how far the "pixel perfectionism" goes, but the few hours I used it (before breaking X11) it felt good.
https://raw.githubusercontent.com/grassmunk/Chicago95/master...
Now compare to these:
https://raw.githubusercontent.com/grassmunk/Chicago95/master...
Or here:
https://raw.githubusercontent.com/grassmunk/Chicago95/master...
Everything is off. Compare to the real thing:
https://external-content.duckduckgo.com/iu/?u=http%3A%2F%2F4...
https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2F...
Or compare to SerenityOS. That's good UI work.