Got myself a training induction burner. Took it for a trial by searing a boneless pork chop. Setting 6 (out of 10) pushed it past the oil smoke point in a few minutes. So at least I now know what to expect (that 3.5 did the job).
@aardrian Woah is that a particularly fancy/pro one? I've had various full induction hobs ("range" in US English? all burners being induction, basically) — never going back to gas or standard electric. On the ones I've had I'd still need it on at least 7 to sear.

@stucox It is a Duxtop 9600LS. Recommended by both Wirecutter (https://www.nytimes.com/wirecutter/reviews/best-portable-induction-cooktop/) and Cook’s Illustrated. Sadly, had to buy through Amazon since nobody locally stocked it.

I cleaned that skillet this morning by putting water in it and using the “Boil” setting (before I scrub with salt) and it was boiling in maybe 30 seconds. A bit scary, actually.

The Best Portable Induction Cooktop

We cooked for months with portable induction burners and found that the Duxtop 9600LS has the best features and performance for everyday cooking.

Wirecutter: Reviews for the Real World