All the induction stoves I've tried, here in the EU, are great at boiling one pot of water. They suck at everything else.
E.g. want to boil two pots of water in parallel? No can do - after warming up seemingly forever you will have one pot boiling for 5 seconds, then stopping and letting the other pot boil for five seconds, and so on.
I want to love induction - no gas pipes, so much easier to clean, so much better for air quality - but the regular stuff you can buy in stores just isn't there yet. Just the fact that they use a plug which can carry at most 3kW should be enough proof that you cannot use them for serious cooking.
Holy smokes, if you folks across the pond plug your stoves into 3kw, you indeed should never use that for cooking. The plug behind my stove can carry 12, about 10 continuous.
Now, about your issue with parallel cooking: you indeed can not send Max Power to two pots if they are on the same rail. However, even the cheapest ranges I've ever seen have 4 burners, two rails. Which means you _could_ boil two pots of water, as long as you use the correct two burners. You learn pretty quickly which burners share a rail. I'd imagine the really nice ones have a transformer per burner so it's never an issue.
And as long as you're not trying to send boil-in-20-seconds kind of power, you can use all the burners without noticing anything.
Thats not the norm, we have at least 2 phases to our stovetop, and Iv'e never encountered any kind of power limit, even when using the "boost" mode on several pans at the same time.
We used to live in an apartment with single phase, there we had to somewhat limit the induction top to about 5,5kW and once again I practically never enocuntered it maxing out.
E.g. want to boil two pots of water in parallel? No can do - after warming up seemingly forever you will have one pot boiling for 5 seconds, then stopping and letting the other pot boil for five seconds, and so on.
I want to love induction - no gas pipes, so much easier to clean, so much better for air quality - but the regular stuff you can buy in stores just isn't there yet. Just the fact that they use a plug which can carry at most 3kW should be enough proof that you cannot use them for serious cooking.