Even if the rhetoric of urgency is old hat, the context for it is not.
As compared to that, Israel/Palestine is old hat, and at most a peripheral irritant.
Basquiat, in turn, seemed to make Warhol relevant again—he was an old hat at this point, his work increasingly out of vogue.
"out of date," first recorded 1911. As a noun phrase, however, it had different sense previously. The "Classical Dictionary of the Vulgar Tongue" (1796) defines it as, "a woman's privities, because frequently felt."
Obsolete, old-fashioned: “Get with it, Murray; your methods are strictly old hat.”
Out of style; old-fashioned: Tubular stuff is now old hat (1911+ British)