Comment by ttfkam

That's nothing. Even though the hardware has supported it for at least 15 years, MacOS still doesn't have support for MST (DisplayPort daisy-chaining). Instead of just plugging one cable in and having two externals connected to each other, we've all either had to use a cable per monitor (using two scarce ports on the laptop) or buy a $100-$300 box that will do the work for us.

Back when installing Windows on a MacBook with Bootcamp was pretty common, it was galling to have Windows support MST perfectly fine on the Apple hardware while MacOS reverted to simple (useless) mirroring.