In the not-distant future there will be a single monitor that gets you the best of both worlds. For the contemporaneous, I maintain that the above is the best monitor setup available to us in 2020. I use the tiny E-ink monitor as much as possible, including now, for my blitz matches on chess.com, and of course for writing and sometimes reviewing papers. But as I mentioned earlier unfortunately for certain bureaucratic tasks that not all of us can skip altogether you just need a bigger monitor with color. So I push a button on the hdmi switch, and the image blasts open on the 30-inch screen, m’illumino d’immenso, and suddenly the mouse feels like the interface from Minority Reports.