And I think a pizza ordering site is a good case for server-side and mostly static HTML. There's very few things on such page that change more often than every few days, and as for the dynamic stuff, all you really need to manage is a client-side basket, which is trivial in isolation. I believe you could easily cut the time spent on such site by a third if you approached it this way. Even more for people accessing the site from older machines.

I can tell, because I order pizza quite frequently from a variety of sites.