Zoom has turned us all into David Letterman, talking in riddles and tapping on the screen

I spend my days in the basement with my health, a computer, a phone, Stephen Sondheim and, when fortune smiles, a loyal dog. From time to time, I either initiate, or respond to, invitations to meetings on Zoom, a flawed but deftly branded videoconferencing app that has thrived during this pandemic by following the lead of Hoover, Kleenex and Chapstick and achieving the rare feat of becoming …