About ext-ux package members

Always been confused about the ux components within the framework..

With 5.1 Sencha introduced the new ext-ux package:

http://ift.tt/1wmaSZ1

And what i can see - it contains only the Advanced Color Picker and the Rating Widget.

What is the rason the other ux components to still live in the examples folder?

Particularly, i mean the ItemSelector and Multiselect form fields which are here for a long time?

About ext-ux package members