I mean, "just a money thing" is a good reason, as far as Apple is concerned.So it’s Apple’s choice not to support MST? Is there a good reason, or is it just a money thing?
From a purely technical perspective, though, it kind of falls in line with fractional scaling in MacOS. It is clearly something that Apple could support, but since it would only be needed if you weren't running 100% Apple-branded hardware, then it isn't something they're going to go out of their way to support unless the wheels (that is, their customers) get squeaky about it.