What were the first and last songs to sound like 80s songs?

Yeah, I thought the idea was “last hit song to still use ‘80s-style songwriting & production with the original intentions behind it, and not as a ‘retro’ aesthetic move,” or something.

(And I think it has to have at least charted for the answer to be interesting, because obviously some artists never stopped making ‘80s-sounding music with the original intentionality... same with every decade.)