If I understood you right, you asked about saving an entire section (or template) as global, so that when you update it in one place it updates everywhere. The article you linked to only applies to individual widgets, not entire sections.
Is there a way to create a global section? This would be very helpful to designers like me who want a section to be repeated throughout a site. For instance, at hcafarmk.com, I’ve created a repeating section of sponsor recognition on every page. Because none of the pre-made widgets functioned the way I needed them to (aligning all the logos on center-horizontally), I had to create everything manually through columns, sections, and a repeating image widget. I saved the whole thing as a template. However, when I go in to update the template, it doesn’t update the dozen pages where this template is used.
Any advice on how to make these changes globally would be greatly appreciated.