I do not understand what is the purpose of design.pega.com? Currently it contains examples on how to use Cosmos React components. But as far as I see it - it isn't possible to use it in combination with OOTB Pega Platform.

I see that Pega references design.pega.com a lot, but that site shows so many things that aren't available in OOTB React Cosmos. Color Picker, Emoji Picker, Modal Window, Tree, even just a regular button I cannot add to the view... How to use it all?

Initially I though that it would be possible to use with React SDK, but all React SDK examples are build on MaterialUI instead of Cosmos for some reason.

This brings so much confusion to the customers.

I've seen a message from Richard Marsot:

design.pega.com is about the Cosmos Design system and the component library - this is NOT a documentation of what you can do in App Studio and how you can author views. 

But how we can use it in a separation from App Studio? This is a cool looking theme, but if developers cannot use it during an implementation and most of the components are available only for Pegasystems employees - then what is the point to make it public?