MVC with jQuery or some SPA framework at some point you have to consider why the menu is tied to the view at all, and not deriving its state from the user session. I'd say in either case who decides that (and who rewrites it) is equally messy. The nice part about SPAs is you can usually slice off that functionality and give it to one set of developers to deal with in isolation much easier than you can with an MVC structure.
> why the menu is tied to the view at all, and not deriving its state from the user session
Yes! But it turns out in some of these frameworks “the user session” is not a magic global, your view has to pass it into the template.
And even if it was a global, you are super limited in how much derived data/queries you can compute off of it. Because you’re not using a full-powered language – instead it’s jinja, mustache, or similar.
