2021 arrived with some pretty big questions: Can we conquer the COVID-19 pandemic? “Saturday Night Live” answered the last of these, at least in part, with its first episode of Joe Biden’s presidency. Despite all the grist — an astounding U.S. Capitol insurrection, Kim and Kanye’s split, Bernie Sanders’ inauguration mittens meme, QAnon idiots in fur, vaccine roll-out blunders, GameStop …