One good use for the surface sensor: pressure cookers. I dug my Fagor Duo -- which I basically quit using when I moved into my condo with an electric stove -- out of storage, and did a water test today. Setting a surface temperature of 267F resulted in a nice, reliable burble from the valve. I lost about half a cup of water over a ~15 minute cook and natural release, but I suspect a lot of that was when I was adjusting the temperature.
Not quite as "set-and-forget" as my Instant Pot, but pretty close, and the extra capacity will be nice to have. Will probably try a recipe in it tonight or tomorrow.