Just adding my two cents – or +1 or upvote or whatever anyone wishes to call it – for reusable components. Especially for navigation and other such header / footer elements.
This, the need for it, is very basic. Not having that capability is sooooo 1990s (and I can say that 'cause I was building websites back then in text editors and cursing repeated elements. Server side includes to the rescue by the late 1990s). But it is basic. Maybe too basic for all the wonderful things y’all’re achieving so it gets lost in the glitter of new and shiny features. :0)