I'm confused though. If they support MST[0], how did they rip out daisychaining specifically? I don't understand MST well enough to see how a computer connected to one large monitor with two MST regions would be different than two monitors daisy chained using MST.

It really does look like Apple specifically has disabled it because there isn't an apple product that supports it, but that may be due to my own ignorance of MST.

[0]: https://support.apple.com/en-us/HT202856