It was. So was styling form elements. The idea isn't to pretend it's 1999 and only use stuff that works in netscape4/IE5, but to build pages in the same way as

It was. So was styling form elements. The idea isn't to pretend it's 1999 and only use stuff that works in netscape4/IE5, but to build pages in the same way as then. <nav> adds something useful - it helps screen readers out, but costs nothing.