“Together at Home,” by design or happenstance, settled on a pretty solid [tone]. It was positive but not overeager to perk us up, and earnest without ladling on schmaltz. ... There are those of us who dread hearing certain inspirational chestnuts revived in these settings. But when Stevie Wonder is the one reviving Bill Withers’ “Lean on Me,” well, there’s nothing to dread. ... [Taylor Swift] emerged as sober truth-teller at nearly the last minute, appearing alone, mirrored by her piano top, to perform a song she may be unlikely to sing under any other circumstance outside the studio, “Soon You’ll Get Better.”