Earlier quoted context omitted.
Yes, it's funny when some new app announces "now we have dark mode!" with much fanfare and commotion, when the ability to adjust the colours and appearance of individual UI elements across the whole OS was the norm back in Windows 3. https://guidebookgallery.org/pics/gui/settings/appearance/wi...
Windows 3 themes never worked that well though. Dark mode is a single Boolean flag, which is much easier for application developers to follow.
You could tell the ones who didn't know what they were doing by the invisible text littering their UIs under some color schemes. This continued into the Web era. There were tons of defective sites that overrode your system background color with a hard-coded white background, but didn't bother setting the text color to black.
The result was invisible text on any system with a "dark" (non-inverse) color scheme. DUHHHH
There are probably still millions of such sites today, but now UIs are so gimped that they hide the defect.