Click through to read some of the highlights.
If you show a nonprogrammer a screen which has a user interface which is 100% beautiful, they will think the program is almost done.
People who aren't programmers are just looking at the screen and seeing some pixels. And if the pixels look like they make up a program which does something, they think "oh, gosh, how much harder could it be to make it actually work?"
Today, if you want to stick with El Capitain, you can run that on a 9 year old Mac.
How can you install it? It's no longer visible on the App Store. Is there a way to order a physical disc?
Work continues in this area. -- DEC's SPR-Answering-Automaton