[vluft]

the breville/polyscience control freak does this, as a single burner, _very_ well, though it's not cheap. I use mine for anything requiring fine temperature control over time & deep frying, but just use my gas range for more general cooking tasks. the control freak certainly proves that it's possible to make a non-gas burner that performs acceptably for me (also no touch controls, which is mandatory), but nobody else is making one. My ideal range setup would be something like 2x control freaks and then a 30k BTU gas burner with an electric combi oven that can do temperature & steam control as precisely as anova's countertop one, but there's zero chance of anyone ever making something like that.