Header managed in the same way as footer

Hello guys,

First of all I'm sorry for may bad english.

I'm just discovering this really awesome CMS. It's exactly what I need. It produces very simple html code output that I just need to style.
Congratulations for this work. I continue to investigate on it by trying a migration from an existing ecommerce site.

Now I have a suggestion. The footer is managed as a snippet. Why it's not the same for the header?
Sometimes we may have complex headers but you provide only a navigation snippet. What I'd like to have is a snippet header built in the same way than the footer and the possibility to integrate menus defined in the snipped navigations to this header as a streamfield. More generrally navigations should be available everywhere as a snippet like a card or carousel.

Maybe this can be done by using the reusable content feature but I'm not really sure about and in any case this is not intuitive.

Kind regards

Pierre