Biden literally retired and came back because he was the only one who could defeat Trump and did. He wasn't young in 2020 and voters chose him over younger options like Buttigieg and Klobochar. Despite being an "old war-horse" he was the most progressive president since Johnson. He ended the war in Afghanistan, canceled millions of student debt, passed the large investment in climate in history, capped prescription drugs, and was the most LGBT friendly president in history and we threw that all away over Gaza.