The ones here in Europe have 3phase connectors and go up to 7kW.
Yes, Europe is pretty fortunate in that respect. They have 2x the power at normal outlets, while US normal outlets are 110v at 15amps.
This means there are some things possible in europe that are underpowered or impossible in the US. Tools like air compressors or garden equipment like electric mowers are smaller.
My take is that most of them are crap. They usually have 10 power levels, which is too few. Some also have temperature-based settings, but I suspect the sensors are too removed from the food surface to be accurate and they're basically ornamental.
I think you need good cookware that can spread the heat. I don't know what cookware is good, but most cookware just scorches your food in a ring-shaped pattern.
I do have one friend who spent a boatload of money on a gaggenau induction cooktop he loves. it seems to have elements spread out on the surface and adapts to the size and number of pans.
He also dedicated a 220v circuit to the thing, so it can pump out lots of energy, especially compared to ~1200 watts from a 110v countertop one.