Is this really true? Yes, there are currently support issues, but this would seem to be because Apple exclusively makes its own hardware and doesn't legally permit running their OS on anything else. Might macOS thrive if it was retargeted to (or at least officially permitted use of) high-end 3rd-party hardware? Microsoft doesn't make their own high-end workstations, and Windows seems to be doing just fine.
But that is irrelevant for a lot other use cases.
Hackintoshes are getting better, but Marco is fundamentally right. Any OS update could break your system, which means you need to wait before installing an update, which opens you up to security and/or professional risks (for example, if it takes a couple of months for the newest MacOS to be made suitable for a hackintosh, that's a couple of months where you cannot update your iOS apps with the latest features, since XCode versions also tend to be tied to OS versions).
Which is not true. I have gotten my iMessage to work without having to clone a serial number.
https://www.reddit.com/r/hackintosh/comments/2wohwn/getting_...