But it is not built-in.
That is what I'm asking for. Easy and fast to configure shared content parts is key feature for CMS. Even episerver have it.
1. You can share web part(s) on a different page template using Visual inheritance only.
This require good and accurate template inheritance from beginning, we got so many issues with clients, who like to change design each week. Some times you need to develop fast, as well. And if you got a request - hey we want to change inner templates - you will have to redo same work once again. So visual inheritance don't work so well.
2. Use widgets. They are of two types. Widgets added by editor (part of a page template) and widgets added by end user (part of a document itself).
From overview it is impossible to understand how to reach my goal - one change apply to all (even different) templates.
As it was mentioned in video you can use repeaters to reach my goal, - shared content across site - but, as it was mentioned, it is something that require extra time to configure. What I'm trying to ask - please give Kentico users-developers more easy way to do same stuff.